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Open Access Article
1 - A Useful Algorithm for Cost and Asset Management in Cutting Industries
H. Javanshir M.T. Taghavifard F. EslamiEconomic management and a correct production is one of the important factors in managing of asystem. One Dimension Cutting Stock Problem is a kind of Optimistic problem that cutting industrymanagers like steel ,plastic ,wood and etc. have to deal with it because of a gr MoreEconomic management and a correct production is one of the important factors in managing of asystem. One Dimension Cutting Stock Problem is a kind of Optimistic problem that cutting industrymanagers like steel ,plastic ,wood and etc. have to deal with it because of a great impact that cuttingprocess has on production cost .Ability to use the wastage and concentrate the trim loss on minimum isan important factor for these managers.In fact , in this problem we have two important items ,Order list ,which is the little parts ,and Stockmaterial ,which are the big parts .The main ail is to reduce the trim loss as well as supplying all therequirements .So we call this problem Cutting Stock Problem .we can study it in terms of ItemOriented or Pattern Oriented.Mostly, the manager aim is not only reducing the trim loss, but concentrate it on minimum number ofthe large objects So they can reduce the row material and trim loss costs and economically help to thesystem.In this paper the cutting stock problem is Item Oriented .In this way, an index for focusing the trimloss on minimum number of large objects will be introduce, Then with using Genetic algorithm, a newalgorithm will be suggested and the problem will be solved by using the algorithm .Finally somerandom problems is generated and will be solved by this algorithm. Manuscript profile -
Open Access Article
2 - Evaluating soil contamination with heavy metals (nickel and cadmium) and developing a management strategy in a drilling cutting dump site in Azadegan Plain, Khuzestan province
Mohammadsaeed Sarempour Azita Behbahaninia Hadi ZareimahmoodabadiBackground and Objective: The environmental pollution caused by oil waste is one of the main concerns in drilling industry. Contamination has increased with the expansion of exploration and production activities, which has imposed enormous environmental challenges to th MoreBackground and Objective: The environmental pollution caused by oil waste is one of the main concerns in drilling industry. Contamination has increased with the expansion of exploration and production activities, which has imposed enormous environmental challenges to the drilling industry. This study has been carried out to determine the concentration of nickel and cadmium in a drilling cutting dump site in Azadegan plain in Khuzestan province. Method: Soil samples were obtained from 13 sampling points in drill cutting dump site in Azadegan Plain, Khuzestan province to investigate soil pollution with nickel and cadmium. A-1 was selected as a background station. The rest of 12 stations were named as sample points (B2-M13) and 2 samples were obtained for each station in order to determine the concentrations of heavy metals in different depths. In this study, the Simple Random Cluster Sampling and Stratification Sampling methods were used in an area of 100*100 m2. After preparation, samples were analyzed by atomic absorption spectroscopy. Findings: The results showed that the concentration of cadmium in the soil varied from trace amount to 3.1 mg/kg, which was below the standard limit. Moreover, the concentration of nickel varied from 0.08 to 200 mg/kg. According to the results, the concentrations of heavy metals were lower than the toxicity limits for heavy metals in natural soil. Also there was no significant deviation from EPA, WHO standards and Europe action level for soil. Nickel concentration is negligible in all surface samples. Cadmium concentrations in all samples were below the standard limits. Nickel concentration was found to be over the threshold only in two sample points in depth of 40 cm. Nickel concentrations in K-11 and H-8 were 172 mg/kg and 200 mg/kg respectively. Although there is no sever environmental concerns related to these heavy metals in dumping site, land spreading was suggested as the best alternative for managing the area. Discussion and Conclusions: After performing the experiments, no significant environmental concerns associated with heavy metals was seen. However, land spreading method was chosen as the best method for environmental management in the area Manuscript profile -
Open Access Article
3 - Effect of Drilling Cutting Discharge on Marine Environment and Benthic Foraminifera
Reza Fouladi FardOffshore oil and gas drilling operation activity can release many chemical components toenvironment. Water based muds (WBMs), oil based muds(OBMs) and synthetic based muds(SBMs)are the kinds of drilling muds. SBMs have the good characteristic of OBMs in operation time a MoreOffshore oil and gas drilling operation activity can release many chemical components toenvironment. Water based muds (WBMs), oil based muds(OBMs) and synthetic based muds(SBMs)are the kinds of drilling muds. SBMs have the good characteristic of OBMs in operation time and soWBMs environmental advantage. Direct discharge to sea, transport to onshore to treatment andrepump to well are the disposal methods for this muds. Barium and hydrocarbons are the basiccomponents of drilling muds. Studies show that several year after the end of drilling cutting discharge,the level of sediment pollution by Barium and hydrocarbons around 250m of discharge point is highand after that hydrocarbons decrease quickly but Barium decreasing is slowly. Environmentalevaluations show the bad effect of this waste on benthic foraminifera specifically around 250m ofdischarge point and increase the opportunistic species.The results show that the some of benthic foraminifera species can be successfully employed as bioindicatorsof environmental change. The suggestions for environmental effect of these wastedischarge includes: waste management for reach the zero- discharge, use of low environmental effectmud , environmental assessment and analyses before and after of drilling operation. Manuscript profile -
Open Access Article
4 - Effect of Drilling Cutting Discharge on Marine Environment and Benthic Foraminifera
Reza Fouladi FardOffshore oil and gas drilling operation activity can release many chemical components to environment.Water based muds (WBMs), oil based muds(OBMs) and synthetic based muds(SBMs) are the kinds of drilling muds. SBMs have the good characteristic of OBM MoreOffshore oil and gas drilling operation activity can release many chemical components to environment.Water based muds (WBMs), oil based muds(OBMs) and synthetic based muds(SBMs) are the kinds of drilling muds. SBMs have the good characteristic of OBMs in operation time and so WBMs environmental advantage. Directischarge to sea, transport to onshore to treatment and repump to well are the disposal methods for this muds. Barium and hydrocarbons are the basic components of drilling muds. Studies show that several year after he end of drilling cutting discharge, the level of sediment pollution by Barium and hydrocarbons around 250m of discharge point is high and after that hydrocarbons decrease quickly but Barium decreasing is slowly.Environmental evaluations show the bad effect of this waste on benthic foraminifera specifically around 250m of discharge point and increase the opportunistic species. The results show that the some of benthic foraminiferaspecies can be successfully employed as bioindicators of environmental change. The suggestions for environmental impact of these waste discharge includes: waste management for reach the zerodischarge, use of low vironmental effect mud , environmental assessment and analyses before and after of drilling operation. Manuscript profile -
Open Access Article
5 - Estimation of Surface Roughness in Turning by Considering the Cutting Tool Vibration, Cutting Force and Tool Wear
A. Salimi A. Ebrahimpour M. Shalvandi E. Seidi -
Open Access Article
6 - Investigating the Effect of Cutting Condition on the Plastic Energy in Turning Process of AISI 1050
Mohammad Meghdad Fallah Seyyed Reza Hamzeloo -
Open Access Article
7 - Designing an Artificial Neural Network Based Model for Online Prediction of Tool Life in Turning
A. Salimiasl A. Özdemir I. Safarian -
Open Access Article
8 - The Effect of Focal Distance and Type of Auxiliary Gas on Cut Width in CO2 Laser Cutting of Stainless and Mild Steel Sheets
Hossein Taheri Hamid Zarepour Firouzabadi Majid Hashemzadeh -
Open Access Article
9 - Chip Formation Process using Finite Element Simulation “Influence of Cutting Speed Variation”
A Kherraf Y Tamerabet M Brioua R Benbouta -
Open Access Article
10 - Effects of different harvesting times on the yield and protein content of Bami alfalfa under micronutrient foliar application in Kerman region
Hojjat Safari Kamal Abadi -
Open Access Article
11 - The Effect of Nozzle Diameter and Water Pressure On Cutting CK45 Steel Quality in Water Jet Process
Unes Anamoradi Mehrdad Ozv AminianCold cutting properties is one of the advantages of abrasive water jet usage that does not generate heat and prevent melting or cracking or warping and surface hardening of the parts. In this study, the effect of nozzle diameter and water pressure in two different amoun MoreCold cutting properties is one of the advantages of abrasive water jet usage that does not generate heat and prevent melting or cracking or warping and surface hardening of the parts. In this study, the effect of nozzle diameter and water pressure in two different amounts has considered on CK45 steel cutting surface roughness. The results show that by increasing the nozzle diameter of 0.76mm to 1.1mm, cutting surface roughness. Also by increasing water pressure from 2500 bar to 3000 bar, although there is no significant change in surface quality, but cutting surface roughness has decreased by increasing water pressure and cutting quality increases. Manuscript profile -
Open Access Article
12 - Experimental and Finite Element Simulation of Cutting Tool Temperature During Hard Turning of Hardened Steel Using Sio2 Nano-Fluid
Mohsen Khajehzadeh Ghorbanali MomenIn this paper, the effect of using Sio2 nano-fluid on cutting tool temperature, during the hard turning of AISI 4340 hardened steel has been studied using both experimental and finite element methods; To achieve this goal, first a finite element model has been developed MoreIn this paper, the effect of using Sio2 nano-fluid on cutting tool temperature, during the hard turning of AISI 4340 hardened steel has been studied using both experimental and finite element methods; To achieve this goal, first a finite element model has been developed in case of dry hard turning of AISI 4340 hardened steel. The results of this model was then verified by experimental measurements of cutting forces and cutting tool temperatures. In continuation, a set of experimental tests were designed and executed to study the effect of nano-fluid application and its concentration on cutting tool temperature. According to the achieved results, there is a good agreement between finite element and experimental results. These results also show that, cutting tool temperature for hard turning of AISI 4340 is 30% of the dry hard turning and the percent of reduction in cutting tool temperature grows gradually with increasing nanofluids concentration (0.6 % wt) Manuscript profile -
Open Access Article
13 - Simulation of static and dynamic shear forces and vibrations for used milling ceramic tools
Parviz GhazviniyanShear tools with ceramic inserts are increasingly used in the machining of super alloys commonly used in the aerospace industry. Ceramic inserts produce higher cutting speeds due to higher thermal resistance compared to carbide inserts. But the success of this process i MoreShear tools with ceramic inserts are increasingly used in the machining of super alloys commonly used in the aerospace industry. Ceramic inserts produce higher cutting speeds due to higher thermal resistance compared to carbide inserts. But the success of this process is very sensitive to the correct choice of process parameters. In this study, analytical process models for attachment milling tools with round ceramic inserts are presented. These models can be used to determine shear parameters for optimal quality and maximum efficiency. First, the geometry of the implant shear margins was formulated under the effect of angles on the implants. An analytical shear force model was then developed. This allows the analysis of the effects of parameters on shear forces. A field time model has also been developed to analyze the dynamic shear forces and static limits for the milling process. After that, the models were implemented in the MATLAB GUI to facilitate the applications of the model in the industry. The shear correlation coefficients required to calculate the shear forces were identified from shear tests with Inconel718. Then the shear force model was validated with shear experiences. After obtaining the instrument model data through pulse test, the forces and dynamic shear vibrations were simulated by the time domain model. A series of simulations were performed to determine the static limits in some operating conditions using the time domain model and static edges were drawn for the tool under study. Manuscript profile -
Open Access Article
14 - Online Dimensional Controlling System for Drilling
Reza Farshbaf Zinati Ahmad Habibi Zad navin Mohammad Reza Razfar -
Open Access Article
15 - Yield and Physiological Response of Red Bean Genotypes (Phaseolus vulgaris L.) to Cutting Irrigation off at Different Growth Stages
Shadi Sadat Mohajerani Mojtaba Alavi Fazel Hamid Madani Shahram Lack Adel ModhejWater deficit and graduall reduction of available water resources are the limiting factors of crop production. To investigate the effect of water deficit stress on yield and components of some red bean genotypes a split plot experiment in the form of randomized complete MoreWater deficit and graduall reduction of available water resources are the limiting factors of crop production. To investigate the effect of water deficit stress on yield and components of some red bean genotypes a split plot experiment in the form of randomized complete block design with three replications was carried out at the Agricultural Research Station of Islamic Azad University, Arak Branch. The treatments consisted of full irrigation (control), cutting irrigation off during flowering stage, cutting irrigation off of pod filling stage and three genotypes of red bean (derakhshan, goli, and D81083). The results showed that the effect of cutting off irrigation during the growth stages on biological yield, grain yield, harvest index, number of pods per plant, number of seeds per pod was significant. The results also showed that the highest seed yield belonged to the full irrigation (control) treatment, where D81083 and goli produced higher yields than derakhshan. Highest grain yield was belonged to goli at full irrigation (control) treatment. Among the genotypes under study, D81083 had the lowest amount of reduction equal to 60 percent during cutting off irrigation at flowering stage. Number of seeds per pod decreased when irrigation was cutted off during the flowering stage. Derakhshan produced higher yield than the other genotypes and its seed per pod decreased by 38 percent. The results also revealed that red bean genotypes were very sensitive to deficite water stress. As a whole D81083 and goli genotypes were higher yielders than Derakhshan under limited water conditions. Manuscript profile -
Open Access Article
16 - Effects of Different Levels Drought Stress and Plant Density on Yield and Yield Components of Corn (Zea mays, SC. 704)
Sh. Sepasi K. Kelarastaghi H. EbrahimiTo study the effects of different levels of irrigation cuttings and plant densities on yield , and yield components of corn (SC 704), an split plot experiment based randomized complete block design, with three replication was conducted in Damghan, Iran. Main plots were MoreTo study the effects of different levels of irrigation cuttings and plant densities on yield , and yield components of corn (SC 704), an split plot experiment based randomized complete block design, with three replication was conducted in Damghan, Iran. Main plots were 4 cuttings of irrigation: (jointing, tasseling, milking and seed hardening stages) and sub plots consisted of four plant density: 45000, 60000, 75000 and 90000 plants per hectare). Result showed that corn tolerated the last of irrigation cutting as corn pared to its cutting at other stages and has increased yield. Cutting of irrigation at seed hardening stage, increased number of seeds per ear row, number of rows per ear, and 100 kernel weight. While when plant density increased seed yield, number of seeds per row, number of rows on ear, and 100 kernel weight decrease. Manuscript profile -
Open Access Article
17 - Simultaneous effects of different levels of indole butyric acid and inoculation with growth promoting bacteria on some growth and biochemical traits of olive (Olea europaea L.) scion
Mohammad Reza Safari Motlagh Behzad Kaviani Seyyed Ahmad Mousavi MohammadiIn order to investigate the effect of different levels of IBA and strains of Pseudomonas fluorescens bacteria, an experiment was conducted as factorial with completely randomized design containing two factors and three replications. In the first factor, the effect of th MoreIn order to investigate the effect of different levels of IBA and strains of Pseudomonas fluorescens bacteria, an experiment was conducted as factorial with completely randomized design containing two factors and three replications. In the first factor, the effect of three levels of IBA (0, 2000, and 4000 mg/ ml) and in the second one, the effect of two strains of P. fluorescens (R5 and R64) were investigated on olive (Olea europaea cv. conservaliya). Results showed that bacterial inoculation with R5 strains increased shoot and root dry weight, total dry weight, nitrogen concentration, and phosphorus uptake compared to control, but there was no significant difference between R5 and R64 strains in terms of total chlorophyll. The 2000 mg/ml IBA also increased shoot and root dry weight, nitrogen concentration, total chlorophyll, and total dry weight compared to control while the maximum phosphorus uptake was obtained at 4000 mg/ml IBA. The interaction of effects of IBA and bacteria in morphological characteristics and uptake and concentration of elements showed that maximum average were obtained at 2000 mg/ml IBA and R5 strain treatment. According to the obtained results, the application of both of 2000 mg/ml IBA and R5 strain for improvement in rooting is recommended. Manuscript profile -
Open Access Article
18 - The effect of different levels of indole-3-butyric acid and naphthaleneacetic acid on the rooting of Olea europaea cv. Mari shoot cutting
Behzad Kaviani Mohammad Reza Safari Motlagh Asghar Hasankhah Alireza EslamiOlive (Olea europaea) is a tree species whose seedling grows slowly and the propagation by seed is time consuming and increases the probability of genetic alterations. The most appropriate method to propagate olive is the use of shoot cutting as asexual propagation; how MoreOlive (Olea europaea) is a tree species whose seedling grows slowly and the propagation by seed is time consuming and increases the probability of genetic alterations. The most appropriate method to propagate olive is the use of shoot cutting as asexual propagation; however, semi-hardwood olive cutting is hard-rooting. The purpose of the current research was to facilitate rooting on shoot cutting of olive cv. Mari using the concentrations of 2, 3, and 4 g l−1 of indolebutyric acid (IBA) and naphthaleneacetic acid (NAA), singularly and in combination with each other. Used cultivation bed was sand. The research was done as a factorial based on a randomized complete block design with three replications. Rooting percentage, root number, root length, and root fresh and dry weights were measured. Based on the results of this experiment the highest percentage of rooting (83.30%), maximum root number (17.09), longest root (22.67 cm), and dry (2.30 g) weight were obtained in cuttings treated with 3 g l−1 NAA together with 3 g l−1 IBA. The highest fresh weight (4.83 g) was obtained in cuttings treated with 4 g l−1 NAA together with 3 g l−1 IBA. The lowest percentage of rooting, maximum root number, shortest root, and lowest fresh and dry weights were obtained in control. Manuscript profile -
Open Access Article
19 - The Effect of Power and Maximum Cutting Speed on the Material Removal Rate and Cutting Volume Efficiency in CO2 Laser Cutting of Polycarbonate Sheets
Majid Hashemzadeh Mehdi Mahammadi -
Open Access Article
20 - The Effect of Power, Maximum Cutting Speed and Specific Point Energy on the Material Removal Rate and Cutting Volume Efficiency in CO2 Laser Cutting of Polyamide Sheets
Majid Hashemzadeh Reza Poorshaban -
Open Access Article
21 - Machinability Investigation of Inconel 657 in High-speed Turning
Amir Hossein Khoei Hasan Fathi Masoud Farahnakian Mohammad Reza Razfar -
Open Access Article
22 - The Effect of Artificial Aging Treatment and Lubrication Modes on the Cutting Force and the Chip Surface Morphology when Drilling Al-Si-Mg (A356) Cast Alloys
Seyed Ali Niknam Keyhan Jabbari -
Open Access Article
23 - Determination the Mechanical Stress on the Cutter Bar of the Harvesting Combine by Abaqus
Alireza Shirneshan Ali Hori Najafabadi Bahram Hosseinzadeh Samani -
Open Access Article
24 - Optimization of Cutting Parameters Based on Production Time Using Colonial Competitive (CC) and Genetic (G) Algorithms
Hossain Towsyfyan Seyed Adnan Adnani Salehi Shahed Mohammadi Sepideh Hadipour Moradi Basim Freegah -
Open Access Article
25 - Development of a New Dynamic Friction Model for Analytical Modeling of Elliptical Vibration Assisted Turning Process
Reza Nosouhi Saeed Behbahani Saeid Amini Mohammad Reza Khosrojerdi -
Open Access Article
26 - Optimizing the Cutting of Inconel 718 Sheets with CO2 Laser by Particle Swarm Algorithm
Saeid Kiani Rasoul Tarkesh Esfahani Zahra ZojajiIn this paper, the impact of different operative variables on the quality of cutting of Inconel material 718 is studied. Utilizing Taguchi test design, the input variables including carbon dioxide laser power and the cutting speed for cutting three different thicknesses MoreIn this paper, the impact of different operative variables on the quality of cutting of Inconel material 718 is studied. Utilizing Taguchi test design, the input variables including carbon dioxide laser power and the cutting speed for cutting three different thicknesses of Inconel 718 alloy were investigated in order to achieve the optimal conditions. After obtaining experimental test results, dataset was modeled using artificial neural networks. The neural network model is then used for evaluating candidate solutions in particle swarm optimization (PSO) algorithm which is employed for optimization of cutting conditions. The results indicated that when the laser power of is 1714 (W), the cutting speed is 1382 (mm/min) and the thickness of the material is 0.8 (mm), The best quality for cutting Inconel 718 is achieved with a carbon dioxide laser cutting machine. The results of optimal cutting parameters of Inconel alloy with carbon dioxide laser which were obtained by PSO were verified through an experimental test and similar papers. The results of this experimental test were very close to the optimal values of the PSO, which demonstrates the efficiency of neural network model in predicting the quality of cutting and the efficiency of PSO in finding optimal conditions. Manuscript profile -
Open Access Article
27 - Some Results on facets for linear inequality in 0-1 variables
D. Sashi Bhusan B. Bagaban J.P. Tripathy -
Open Access Article
28 - Effect of Auxin derivatives on morphological and isoenzyme pattern of enzymatic Antioxidant peroxidase (POX) of “blinding eye mangrove” Excoecaria agallocha.L stem cuttings.
Ramamurthy Somasundaram Roseline Jebapriya REYAZ MIR -
Open Access Article
29 - Cuckoo Optimization Algorithm in Cutting Conditions During Machining
Ahmad Esfandiari -
Open Access Article
30 - Root Growth of Morus Alba as Affected by Cutting Size and Low Polythene Tunnel
Irfan Ahmad Muhammad Tahir Siddiqui Rashid Ahmad Khan Muhammad Kashif Tahir Munir ButtAn effort carried out to find out the smaller size of cuttings for propagation ofMorus alba in Experimental area, Department of Forestry, Range Management and Wildlife, University of Agriculture, Faisalabad, 2005. Different size of cuttings i.e.5 cm, 10 cm, 15 cm and 20 MoreAn effort carried out to find out the smaller size of cuttings for propagation ofMorus alba in Experimental area, Department of Forestry, Range Management and Wildlife, University of Agriculture, Faisalabad, 2005. Different size of cuttings i.e.5 cm, 10 cm, 15 cm and 20 cm were planted in polythene tubes of 9 cm x 18 cm. The attempt was also made to compare the performance of cuttings outdoor and indoor at polythene low tunnel. Root length, number of root branches, root diameter and root fresh and dry weight were found maximum in 5 cm cuttings while minimum in 10 cm cuttings. Root growth was found maximum in outdoor as compared to under polythene sheet. Manuscript profile -
Open Access Article
31 - Ficus Benjamina L., Iba, Media, Rooting
Maryam Shirzad Shahram Sedaghathoor Davood HashemabadiFicus benjaminais a very popular and resistant indoor plant in temperate areas. Cutting is the easiest propagation method of this plant and it requires special treatments such as auxin and appropriate rooting medium. In order to test the suitable auxin (IBA) concentrati MoreFicus benjaminais a very popular and resistant indoor plant in temperate areas. Cutting is the easiest propagation method of this plant and it requires special treatments such as auxin and appropriate rooting medium. In order to test the suitable auxin (IBA) concentration and rooting media, a factorial experiment carried out based on randomized complete block design with three replications. Experimental two factors were different concentrations of IBA (0, 2000, 4000 and 6000 ppm) and rooting media (sand, perlite and sand+perlite mixture). Rooting percentage, root number and longest root length was evaluated. Based on the results both rooting percent and longest root length were gained under 4000 ppm IBA. Rooting percent was maximized in combined treatment of "4000 ppm IBA+perlite" and "6000 ppm IBA+ sand". The high number of roots was gained in "6000 ppm IBA+sand". Manuscript profile -
Open Access Article
32 - Effect of Bulb Cutting and Pot Medium on Propagation of Hippeastrum (Hippeastrum hybridum Hort.)
Mohammad Khalid Jamil Mohammad Mizanur Rahman Mohammad Moshiur RahmanExperiments were conducted at the Horticulture Research Farm of Horticulture Department, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during December, 2007 to May, 2009 to investigate the effect of bulb cutting and potting media on MoreExperiments were conducted at the Horticulture Research Farm of Horticulture Department, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Salna, Gazipur during December, 2007 to May, 2009 to investigate the effect of bulb cutting and potting media on propagation of hippeastrum. The bulb cutting significantly influenced all the parameters except days required to first leaf emergence and leaf breadth at 60 DAP. Leaf number at 60 DAP, leaf length at 60 and 100 DAP, number of plant per section of bulb and number of bulb per pot were found to be significantly increased upto second treatment and then gradually decreased with the increase of bulb cutting. The highest number (2.20) of plant per section of bulb, bulblets (2.20) per section of bulb were obtained from 4 sections/bulb while diameter (20.74 mm) of bulb and combined weight (57.65 g) of bulb and plant were maximum at treatment 2 sections/bulb. Potting media also showed significant influence on all studied parameters. The maximum number (2.04) of plant per section of bulb and bulblets (2.04) per section of bulb were revealed at potting media containing only compost while the potting media contained sand, soil and compost at equal amount produced the biggest size of bulblets (20.07 mm) and maximum weight (44.75 g) of bulb and plant combinedly. However, the combined effect of T2 x P3 produced the maximum number (2.60) of plant and bulblets per section of bulb while the biggest size (23.05 mm) of bulblets and the highest yield (68.66 g) of bulb and plants were obtained in T1 x P4. Manuscript profile -
Open Access Article
33 - Assessment of the role of growth reduction factors on some morpho-physiological and yield indicators of rice (Oryza sativa L.) cultivars in climate condition of Khouzestan
Marzieh Gorgizadeh Shahram Lak Abdolali GilaniIn order to Assessment of the role of growth reduction factors on some morpho-physiological and yield indicators of rice cultivars an experiment in the year 2018 was conducted as split plot in a randomized complete block design with three replications. Experimentation f MoreIn order to Assessment of the role of growth reduction factors on some morpho-physiological and yield indicators of rice cultivars an experiment in the year 2018 was conducted as split plot in a randomized complete block design with three replications. Experimentation factors included various rice varieties: Champa, Chermez-anbori and Hoveizeh in the main plot and reducing growth factors include: control (without cutting), consumption of half a liter of medax top in 45 days after planting, cut 65 days after planting to a height of 35 cm and cut 85 days after planting at a height of 35 cm in the subplot was. the results showed difference between levels of reducing growth factors in terms of stem height, panicle number, number of hollow seed per panicle and seed yield were at 1% probability and 1000-seed weight at 5% level. the difference between cultivars in terms of number of hollow seed per panicle at 1% level and 1000 grain weight at 5% probability level. highest number of hollow seed per panicle was in the control and the lowest in the cut 65 days after planting. the highest grain yield was obtained in the application of medax top with average of 4.7 tons/ha and the lowest grain yield with average of 3.19 tons/ha was obtained by cutting in 85 days after planting. So it can be cut by 65 days after the planting and use of the medax top or using the hoveizeh cultivar to reach the desired results in the region. Manuscript profile -
Open Access Article
34 - Genetic Potential Evaluation of Source Rocks in Masjed Soleiman Oil Field
Zahra Rezaee Amin Karampour Bahram Alizadeh -
Open Access Article
35 - A simple approach to the two-dimensional guillotine cutting stock problem
Mir-Bahador Aryanezhad Nima Fakhim Hashemi Ahmad Makui Hasan Javanshir -
Open Access Article
36 - Solving an one-dimensional cutting stock problem by simulated annealing and tabu search
Meghdad HMA Jahromi Reza Tavakkoli-Moghaddam Ahmad Makui Abbas Shamsi -
Open Access Article
37 - An experimental analysis and optimization of machining rate and surface characteristics in WEDM of Monel-400 using RSM and desirability approach
Vinod Kumar Vikas Kumar Kamal Kumar Jangra -
Open Access Article
38 - An ACO algorithm for one-dimensional cutting stock problem
K Eshghi H Javanshir -
Open Access Article
39 - The trim loss concentration in one-dimensional cutting stock problem (1D-CSP) by defining a virtual cost
H Javanshir M Shadalooee -
Open Access Article
40 - بررسی تجربی برش شیشه از طریق شوک حرارتی و عوامل موثر در آن
سید محمدرضا خلیلی -
Open Access Article
41 - Effects of Sudan Grass Cultivars and Cutting Frequency on Forage Yield and Quality Traits at the Central Gondar Zone, Ethiopia
Alemu Tiruneh -
Open Access Article
42 - Effects of Cutting Days on Yield, Morphological and Quality Traits of Three Grass Species under Irrigation Conditions in Mecha District, Ethiopia
Tobiyaw Tsegaye Ashenafi Mengistu Yeshambel Chekol -
Open Access Article
43 - Design, Development and Testing of Low Capital and Operational Cost Shrub Cutting Machine
R. K. Mandloi Rajesh Gupta A. Rehman -
Open Access Article
44 - Studying Varieties and Relationships of Yield and Quality Traits in Tall Wheatgrass (Agropyron elongatum) under Two Cutting Management Procedures
Ata Elmi Ali Ashraf Jafari Amin Farnia Mohammad Bakhtiari -
Open Access Article
45 - Effect of irrigation regime and phosphorus application methods on phosphorus recovery efficiency and grain yield of two rapeseed cultivars
R. Baladi E. Bijanzadeh R. NaderiTo investigate the effects of water deficit and chemical phosphorus (P) application methods on yield and phosphorus recovery efficiency of two rapeseed cultivars, a field experiment was conducted at Agriculture College and Natural Resources of Darab, Shiraz University d MoreTo investigate the effects of water deficit and chemical phosphorus (P) application methods on yield and phosphorus recovery efficiency of two rapeseed cultivars, a field experiment was conducted at Agriculture College and Natural Resources of Darab, Shiraz University during 2013-2014. Treatments including irrigation regimes (common irrigation, cutting off irrigation at mid-flowering and mid-silique formation stages), P application methods (without P, broadcast and band) and rapeseed cultivars (Sarigol and RGS) were assigned in main plots, sub plots and sub sub plots, respectively. Results showed that cutting of irrigation at common irrigation with 25.31 seed numbers per silique had significant differences with mid-flowering with 22.25 seed numbers per silique and cutting of irrigation at mid-silique formation with 22.94 seed numbers per silique . In cutting of irrigation at mid-flowering and band application of P, RGS had the highest biological yield (12435 hg/ha). Common irrigation had the highest (11.02 kg/ha) and cutting of irrigation at mid-flowering had the lowest (5.95 kg/ha) P absorption amount. Overall, P recovery efficiency in broadcast and band application methods of P was 1.09% and 1.38%, respectively. RGS cultivar compared to Sarigol had maximum grain yield under cutting of irrigation at mid-flowering (3830 kg/ha) and mid-silique formation conditions (5428 kg/ha). RGS had the highest rate of assimilate remobilization under cutting off irrigation at mid-flowering and band application of P and it can prevent a further reduction in grain yield when exposed to late season water shortage. Manuscript profile -
Open Access Article
46 - Effects of cutting height and mineral and biological fertilizer resources on yield and rationing parameters of rice (cv. Tarom Hashemi)
farzan fallah Bahram Mirshekari Hematollah pirdashti Farhad Farahvash Mohammad-zaman Nouri delavarAbstractsProvision of nutrients for crops such as rice has a significant role in achieving optimal yield. Therefore, the aim of this study was to maximize the rice plant potential by optimizing the use of mineral and biological fertilizers along with cutting height of r MoreAbstractsProvision of nutrients for crops such as rice has a significant role in achieving optimal yield. Therefore, the aim of this study was to maximize the rice plant potential by optimizing the use of mineral and biological fertilizers along with cutting height of ratoon of rice. The experiment was carried out split factorial based on a randomized complete blocks design with three replications at the Rice Research Institute of Iran (Amol) during the growing season of 2014 and 2015. Three levels of harvesting height including 0, 15 cm and 30 cm from the ground as the main plots and phosphorous fertilizers (triple superphosphate) and potassium (potassium sulfate) in two levels (0 and 50 kg ha-1) were first sub-plots and foliar application of Azospirillium brazilennes and Pseudomonas fluorescens were in two levels (foliar application and non-foliar application) as the second sub-plots. The results demonstrated that the highest grain yield was obtained in treatment of 50 kg of phosphorus fertilizer with a harvest height of 30 cm from the ground with an average of 2017.8 kg ha-1. All mineral and biological fertilizers significantly increased plant height, number of tillers per hill and filled spikelet percentage per panicle. In addition, the use of biofertilizers along with phosphorus and potassium fertilizers resulted in increased yield and yield components. Therefore, the application of the above fertilizers can be a suitable alternative for high consumption of nitrogen in the production of rice rice in the region. Manuscript profile -
Open Access Article
47 - Effect of biological fertilizer and microelements on qualitative traits and yield of chickpea as affected by drought stress condition
nima behdarvandi shykhi arash roozbehaniIn order to study the effect of biological fertilizer and microelements on chlorophyll content, protein percentage and grain yield of chickpea (Cicer arietinum L.) as affected by drought stress condition an experiment carried out in factorial based on complete block des MoreIn order to study the effect of biological fertilizer and microelements on chlorophyll content, protein percentage and grain yield of chickpea (Cicer arietinum L.) as affected by drought stress condition an experiment carried out in factorial based on complete block design with three replications in 2014 at Agricultural Research Station of Roudehen of Islamic Azad University in Damavand. Treatments were three levels of drought stress: normal irrigation (control), stress at flowering stage and stress in early stages of grain filling and the second factor was four levels of biological fertilizer and microelements including control, biological fertilizer (Rhizobium), microelements, Rhizobium + microelements. Results showed that drought stress had significant impact on chlorophyll content, protein percentage and grain yield. Control treatment (normal irrigation) produced the highest chlorophyll content, protein percentage and grain yield. Impact of biological fertilizer and microelements on all traits were non-significant except protein percentage and grain yield. The interaction effect of drought stress and biological fertilizer and microelements for protein percentage and grain yield was significant. Manuscript profile -
Open Access Article
48 - Evaluation the reaction of safflower (Carthamus tinctorius L.) cultivars to irrigation cutting stress at different growth stages
A. Fallah F. Nouri C. MansourifarSafflower (Carthamus tinctorius L.) cultivars had different tolerance to drought stress at different growth stages. Current study was conducted to evaluate and determine differences in drought tolerance at different stages of growth of Iranian safflower cultivars during MoreSafflower (Carthamus tinctorius L.) cultivars had different tolerance to drought stress at different growth stages. Current study was conducted to evaluate and determine differences in drought tolerance at different stages of growth of Iranian safflower cultivars during 2013-2014 growing season as a factorial experiment based on randomized complete block design. The effect of drought stress as irrigation cut in different stages included blooming, flowering, seed filling, blooming + seed filling and blooming + flowering with control was examined on growth and yield of four Iranian safflower cultivars (Uremia3147, Zarghan279, Azarbaijan3148 and Varamin295). The results showed that irrigation cut, depending to growth stage, reduced day to flowering and maturity, plant height, grain number per head, biological yield and grain yield. Azarbaijan 3418 cultivar had higher grain yield and Varamin 295 cultivar had higher drought tolerance. The highest negative impact of stress on yield related to irrigation cut was observed at blooming + flowering (24.6%), blooming + seed setting (23.1%) stages and the lowest one was obtained at seed setting stage (19.7%). Generally, Varamin 279 with irrigation cut at seed setting stage could be recommended for more investigation under limited moisture conditions. � مرحله دانهبندی (7/19%) بود. به طورکلی، کاشت رقم ورامین 279 و قطع آبیاری در مرحله دانهبندی برای استفاده در شرایط محدودیت رطوبت قابلیت بررسی بیشتری دارد. Manuscript profile -
Open Access Article
49 - The Effects of Various Concentrations of IBA Hormone on Rooting of ‘TF92’; New Peach-Almond Hybrid under Ex- vivo and In - vitro Conditions
Ruhollah Haghi Ali Imani Ali Torkashvand Marzieh Ghanbari JahromiOne of the main problems of fruit cultivation, especially peaches and almonds, is the lack of the application of the existing clone rootstocks such as the promising hybrid of peaches and almonds and its unavailability due to its propagation in Iran. So the seedling root MoreOne of the main problems of fruit cultivation, especially peaches and almonds, is the lack of the application of the existing clone rootstocks such as the promising hybrid of peaches and almonds and its unavailability due to its propagation in Iran. So the seedling rootstocks are inevitably used. However these rootstocks cause many problems for the growers due to the lack of uniformity. In order to solve this problem, the effect of different concentrations of indole butyric acid on the rooting of hardwood cuttings ‘TF92’ (promising hybrid of peach and almond) was tested in a private sector greenhouse in Karaj equipped with a heating pad during 2019. In this paper, the effect of 4 different levels of indole butyric acid hormone (IBA) 0, 1500, 2500 and 3500 parts per million in solution on hardwood cuttings was studied in a completely randomized design in three replications. The results showed that there was a significant difference between various concentrations of indole butyric acid in terms of the effect on the characteristics of the mode of investigation such as the percentage of rooting, the number of roots formed, the dry weight of the roots, the length of the roots and the length of the resulting branches in the cuttings. Thus the highest rooting percentage (78.45) was found in the indole butyric acid (IBA) hormone treatment with a concentration of 2500 mg L-1 compared to other treatments. Therefore, this method can be recommended as a suitable treatment for the rooting of wood cuttings of this promising emerging rootstock. Also, the highest percentage of rooted plantlets was obtained on Murashige and Skoog medium (MS) supplemented with 1 mg L-1 IBA. According to this study, the concentrations of 1 mg L-1 IBA results in the maximum rooting, and it has been suggested as a suitable hormone for in vitro rooting of ‘TF92’. Manuscript profile -
Open Access Article
50 - Effect of Cutting Height and Seed Cutting Date on Grain yield and Yield Components in Berseem Clover (Trifolium alexandrinum L.)
MAHNAZ BOVAIRI alireza shokoohfar GHOLAM REZA ABADOUZ -
Open Access Article
51 - The effect of cutting height on the number of China and new varieties of forage sorghum yield in the region of Sistan
ahmad mehraban afsaneh kamalideljoo Omid Azizian ShermehTo study the effects of cutting height on the harvest times and forage yield of some new sorghum cultivars, an experiment was conducted at Zahak agricultural research station (30ํ’54” N, 61’46” W; 483 m above sea level) in the spring season of 2014. The experimental de MoreTo study the effects of cutting height on the harvest times and forage yield of some new sorghum cultivars, an experiment was conducted at Zahak agricultural research station (30ํ’54” N, 61’46” W; 483 m above sea level) in the spring season of 2014. The experimental design was a split plot arrangement in RCBD with four replications.Three sorghum cultivars viz A1=speed feed, A2=pegah and A3=indian(local cultivar) were assigned as main plots and four cutting heights including B1=0(control), B2=5cm, B3=10cm and B4=15cm were randomized in sub plots. Analysis of variance showed that both cultivar and cutting height had significant effect on the wet forage yield of Sorghum. Interaction effect of cultivar and cutting height was significant on the plant height in second and third cutting times, but it was non-significant in the first cutting time. Generally individual and interaction effects of cultivar and cutting height were significant on the dry forage yield of sorghum. On the basis of results, Sorghum had the most(108.3t/ha) and the least(59.48t/ha) wet forage yield in the second and third cutting times respectively. Meanwhile the most(30967.5kg/ha) and the least(10607.5kg/ha) dry forage yield was observed in the second and first cutting times respectively. Manuscript profile -
Open Access Article
52 - Effect of planting date and cutting leaves on agronomic traits and yield of sunflower cultivars in dry farming
M. Javaheri J. DaneshianIn order to study effectsofplanting date and cutting leaves on agronomic traits and yield of sunflower cultivars a field experiment was carried out in a split factorial experiment arranged in RCBD in 2005. Main plots consist of four planting date with ten days increment MoreIn order to study effectsofplanting date and cutting leaves on agronomic traits and yield of sunflower cultivars a field experiment was carried out in a split factorial experiment arranged in RCBD in 2005. Main plots consist of four planting date with ten days increment (from 30 march till 30 April 2005) and sub plots consist of three cultivars (Recor, Zarya, Azargol) with four levelofcutting leaves treatment (first level as control, second level by cutting alternate leaves, third level by cutting on-third of top leaves and fourth levels by cutting of on-third of intermediate leaves). Treatments were donning at flowering stage (R5). Evaluated traits were plant yield per plant, hollow diameter, disk diameter, disk weight, stem diameter, and stem weight, filled grains number per disk, filled grains weight per disk, hollow grain number, 1000 kernel weight, harvest index, productivity effort and grain number per disk. Different treatment ofcutting leaves on harvest index in (p<%1) and plant yield per plant and hollow grain number per disk in (p<%5) were significant. Effect of cultivars on plant yield per plant, disk diameter, disk weight, stem weight, filled grain number per disk, filled grain weight per disk, hollow grain number per disk, 1000 kernel weight, harvest index and productivity effort were significant in (p<%1). Means comparison showed that control treatment had maximum plant yield per plant with11.16 gr/m² and cutting one third of intermediate leaves had minimum plant yield per plant, second planting date had maximum plant per plant and Azargol had maximum plant yield per plant. Manuscript profile -
Open Access Article
53 - Experimental Study of the Effect of Laser-Cutting Process Parameters on Heat Distribution and Cutting Edge Quality of Steel Sheets
Mahsa Mokhtarian Azam Gasemi -
Open Access Article
54 - Investigating on process variables effect of AISI 304 stainless steel machining using minimum quantity lubricant on cutting force
Mohammad Ali Safataj Sayed Ehsan Mirmohammadsadeghi Reza Abedinzadeh -
Open Access Article
55 - Indirect prediction of flank wear using ANNs in turning of CK45
Hossein Sepehri -
Open Access Article
56 - تحلیل فرایند برش قابهای PVC به وسیله گیوتین و ارائه راهکارهای برطرف کردن عیوب برش
سعید شیری پایین دروازه مهران مرادیفرایند برش قابPVC به وسیله دستگاه گیوتین یکی از روشهای­ متداول در برش این­گونه مواد ­است که مورد توجه بسیاری از تولیدکنندگان قطعات خودرو و همچنین تولید­کنندگان لوازم تزئینی از جنس PVC قرار گرفته است. در این مقاله ابتدا تأثیر پارام Moreفرایند برش قابPVC به وسیله دستگاه گیوتین یکی از روشهای­ متداول در برش این­گونه مواد ­است که مورد توجه بسیاری از تولیدکنندگان قطعات خودرو و همچنین تولید­کنندگان لوازم تزئینی از جنس PVC قرار گرفته است. در این مقاله ابتدا تأثیر پارامترهای اصلی مانند سرعت برش، نوع روانکار و نیروی فشاری قطعه­گیر بر پارامتر صافی سطح مقطع برش خورده به وسیله آزمایش بر روی یک نمونه مشخص بررسی شده است. سپس با استفاده از نرمافزار ABAQUS و انجام شبیه­سازی تأثیر این پارامترها مورد بررسی قرار گرفته است. بررسی نتایج به دست آمده از آزمایشها و نرم­افزار تأثیر شدید این پارامترها را بر صافی سطح و نیروی برش نشان می­دهد. در پایان با توجه به آزمایشهای انجام شده، چند راه حل برای بهبود عیوب دستگاهها ارائه شده است Manuscript profile -
Open Access Article
57 - بررسی نیروهای ماشینکاری سوپر آلیاژ اینکونل 718
سید مسعود بدخشیان مجید کریمیان سید علی افتخاریاز آنجایی که ابزارهای برشی به کار رفته درفرآیند ماشینکاری سوپر آلیاژها تحت تأثیر نیروهای ماشینکاری زیادی قرار گرفته و در نتیجه باعث پایین آمدن عمر ابزار می گردد، بنابراین بهبود ماشینکاری آلیاژ و کاهش نیروهای برشی وارد بر ابزار های برشی و افزایش عمر ابزارها یک نیاز اساسی Moreاز آنجایی که ابزارهای برشی به کار رفته درفرآیند ماشینکاری سوپر آلیاژها تحت تأثیر نیروهای ماشینکاری زیادی قرار گرفته و در نتیجه باعث پایین آمدن عمر ابزار می گردد، بنابراین بهبود ماشینکاری آلیاژ و کاهش نیروهای برشی وارد بر ابزار های برشی و افزایش عمر ابزارها یک نیاز اساسی می باشد. بنابراین در این پژوهش، تأثیر تغییر نرخ پیشروی بر نیروهای ماشینکاری در فرآیند ماشینکاری سوپر آلیاژ اینکونل 718 مورد بررسی قرار گرفته است. ابزار برشی مورد استفاده در این آزمایش­ها از جنس کاربید تنگستن، مدل 890 و با هندسه مربعی شکل بوده است. همچنین هر یک از ابزارها با استفاده از روش رسوب فیزیکی فاز بخار و با ترکیب شیمیایی TiN/TiCN/AlTiSiNدر دو حالت میکرو و نانو لایه پوشش دهی شده اند. طبق نتایج بدست آمده با افزایش نرخ پیشروی، نیروهای ماشینکاری در هر دو حالت پوشش میکرو و نانو لایه افزایش پیدا کرده است. به طور کلی در این پژوهش استفاده از پوشش میکرو لایه باعث ایجاد نیروهای ماشینکاری کمتری در مقایسه با پوشش نانو لایه شده است و در نتیجه می توان گفت پوشش میکرو لایه دارای عملکرد بهتری می­باشد از آنجایی که ابزارهای برشی به کار رفته درفرآیند ماشینکاری سوپر آلیاژها تحت تأثیر نیروهای ماشینکاری زیادی قرار گرفته و در نتیجه باعث پایین آمدن عمر ابزار می گردد، بنابراین بهبود ماشینکاری آلیاژ و کاهش نیروهای برشی وارد بر ابزار های برشی و افزایش عمر ابزارها یک نیاز اساسی می باشد. بنابراین در این پژوهش، تأثیر تغییر نرخ پیشروی بر نیروهای ماشینکاری در فرآیند ماشینکاری سوپر آلیاژ اینکونل 718 مورد بررسی قرار گرفته است. ابزار برشی مورد استفاده در این آزمایش­ها از جنس کاربید تنگستن، مدل 890 و با هندسه مربعی شکل بوده است. همچنین هر یک از ابزارها با استفاده از روش رسوب فیزیکی فاز بخار و با ترکیب شیمیایی TiN/TiCN/AlTiSiNدر دو حالت میکرو و نانو لایه پوشش دهی شده اند. طبق نتایج بدست آمده با افزایش نرخ پیشروی، نیروهای ماشینکاری در هر دو حالت پوشش میکرو و نانو لایه افزایش پیدا کرده است. به طور کلی در این پژوهش استفاده از پوشش میکرو لایه باعث ایجاد نیروهای ماشینکاری کمتری در مقایسه با پوشش نانو لایه شده است و در نتیجه می توان گفت پوشش میکرو لایه دارای عملکرد بهتری می­باشد. Manuscript profile -
Open Access Article
58 - Effects of cutting number and nitrogen rate on quality and forage yield of field Amaranth
هوشنگ Mehrfam مجید Agha Alikhani اسحاق KeshtkarIn order to study the effect of nitrogen rate and cutting numbers on forage quantitative and qualitative characters of field amaranth (Amaranthus hypocondriacus L.) a field experiment was conducted at Tarbiat Modares University, Iran, on 2019 growing season. Nitrogen fe MoreIn order to study the effect of nitrogen rate and cutting numbers on forage quantitative and qualitative characters of field amaranth (Amaranthus hypocondriacus L.) a field experiment was conducted at Tarbiat Modares University, Iran, on 2019 growing season. Nitrogen fertilizer was applied in five rates (0, 100, 200, 300 and 400 kg.ha-1) and cutting has two strategies: single harvest (at the beginning of grain filling) and double-cutting (at the beginning of flowering and the beginning of the grain filling). Forage yield and qualitative traits (crude protein, acid detergent fiber, crude fiber and cell wall) were measured at both cutting strategy. The results showed that nitrogen rate had significant effect on quantitative traits and crude protein, and also the effect of cutting on all traits was significant except for LAI and cell wall. Cutting×nitrogen interaction was not significant for any traits, except for dry leaf/stem ratio. Mean comparison showed that 200 kg.ha-1 nitrogen treatment and single-cutting harvest had the highest dry forage yield of 27490 and 27120 kg.ha-1, respectively. Although the highest crude protein percentage was obtained in 400 kg.N.ha-1 treatment and were in same statistical group with 200 kg N.ha-1. Also two- cutting harvest with 15% crude protein was better than single-cutting harvest. Manuscript profile -
Open Access Article
59 - Effect of planting date and water deficit on qualitative and quantitative traits of Sunflower in Sistan, Iran
Hamidreza MobasserEffects of sowing date and water deficit were studied at different reproductive growth stages on some qualitative and quantitative characteristics of sunflower cv. Azargol in Sistan, Iran. The experiment was carried out using a split plot experiment based on a completel MoreEffects of sowing date and water deficit were studied at different reproductive growth stages on some qualitative and quantitative characteristics of sunflower cv. Azargol in Sistan, Iran. The experiment was carried out using a split plot experiment based on a completely randomized block design with three replications at the Research Station of Zahak in 2010. There were three levels of sowing times (2010/03/15, 2010/03/24, 2010/04/04) as main-plots, and irrigation levels (normal irrigation, water withhold at budding stage, 50% in flowering and grain filling stages) as sub-plots. The interaction between planting date and water withhold on all traits were not significant. The effect of water withholding different growth stages on grain yield, oil content, grain number, grain weight, were statistically significant at the 1% probability level. No significant difference was observed among treatments in water withhold and oil yield. The effect of planting date on head diameter, grain number and grain weight was significant at 5% level so that the lowest value measurement of head diameter, grain number and grain weight was the third planting date. Withholding irrigation had a negative impact on grain yield and oil percentage. According to the result of the research, 15 and 24 March would be recommended as proper planting date in this region. Manuscript profile -
Open Access Article
60 - Effects of cutting height of main plant on the ratooning traits of different varieties in rice (Oryza sativa L.)
Hamed Firozpouri hamidreza mobasser salman dastan reza yadi abas ganbarimalidarrehIn order to evaluate cutting height of the main plant on the ratooning traits of different varieties in rice, an experiment was carried out in 2006. The experimental design was a split plot based on a randomized complete block with four replications. Main plots were fou MoreIn order to evaluate cutting height of the main plant on the ratooning traits of different varieties in rice, an experiment was carried out in 2006. The experimental design was a split plot based on a randomized complete block with four replications. Main plots were four varieties and lines including Sang Tarom, Tarom Hashemi, Tarom Dylamani cultivars and Irton line and sub-plots were three cutting height of ground cutting, standing (cutting at 40 cm height) and lodging stubble (cutting at 40 cm height). Results showed that the highest plant height, panicle length, number of tiller per hill and grain yield of ratoon were obtained for the Sang Tarom. The reason of highest grain yield in this variety was the increasing panicle length and increased number of tillers per hill. The greatest number of spikelets per panicle was obtained on Tarom Hashemi. The highest plant height and number of tiller per hill was observed at standing method. The lodging stubble method had the highest panicl length, percentage of filled spikelet and 1000 grains weight. The greatest flag leaf length, number of panicle per m2, number of spikelets per panicle and ratoon grain yield were observed in the ground cutting method. The number of spikelets per panicle had positive correlation with grain yield and the grain yield had negative correlation with tiller number at α=%1 level of probability. The results showed that the highest of ratoon grain yield was obtained in Sang Tarom varietiy through lodging stubble method. Manuscript profile