List of Articles Planting Density

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  1 - The effect of nitrogen, planting density and number of seedling in the main farm on morphologic qualities, functional components and quantitative and qualitative functions of ratoon rice (Oryza sativa L.) production cultivars Sangtarom
  mohammad reza Khodadadi Balanaghibi بهرام حيدرنيا سماکوش
  To investigate the effects of different amounts of nitrogen, planting density and number of seedling in the main farming on morphologic qualities, functional components and quantitative and qualitative functions of ratoon rice production cultivars Sangtarom, an experime More

  To investigate the effects of different amounts of nitrogen, planting density and number of seedling in the main farming on morphologic qualities, functional components and quantitative and qualitative functions of ratoon rice production cultivars Sangtarom, an experiment was conducted on a field in Babol, in 2008. Split factorial experiment was conducted in randomized complete block design in three replications. In this experiment four levels of nitrogen fertilizer (0, 46, 69, 92 kg ha-1 from the urea fertilizer source) were used as main factor and sub factor, including the first two planting densities (120 and 40 plants per square meter respectively, sowing pattern 10 × 8.3 and 16.6 × 15 cm square). For the second factor two planting methods frutescence (single seedling) and univalve (3 seedlings or bud), were used respectively. The result of experiment indicated that maximum ratoon production consumption, respectively 46 and 92 kg N ha-1, also the maximum ratoon production obtained under density 120 plants in square meter and with the three seedlings could create an increase in some functional components, such as the number of panicles in square meter, in the total number of spikelet in panicle, in the number of filled spikelet and in the weight of thousands seeds. Also the quality of amiluze under the consumption of 92 kg N ha-1 by density 120 plants in square meter and also under the condition of univalve planting (3 seedlings) reached to its maximum value. Manuscript profile
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  2 - Effect of Plant Population and Arrangement on Yield and Yield Components of Medicine Plant Nigella Sativa
  بهناز عبدالرحيمي
  Abstract This research has been done to study the effects of plant population and arrangement on quantitative and qualitative characteristics of three different varieties of Nigella Sativa. The study was conducted in the form of factorial with completely random blocks More

  Abstract This research has been done to study the effects of plant population and arrangement on quantitative and qualitative characteristics of three different varieties of Nigella Sativa. The study was conducted in the form of factorial with completely random blocks designed with 4 replications at Saatloo Agricultural Station – W. Azarbaijan. In this research the first factors (A) contained two 20 and 40 cm inter-rows; the second factors (B) contained three 2, 4 and 6 cm intra -rows; and the third factors (C) contained three different varieties of Baft, Bukan, and Arbil. The specimens were planted on April 22nd, 2009. The results showed that the effects of plant population and arrangement harvest on capsules and total weight of stems, leaf weight, seed weight, oil percentage and seed efficiency were significant. Baft ranked in a good position in efficiency, but 1000-gram weight in Arbil variety was better. Seed efficiencies of inter-row 20cm, of intra –row 2cm, and variety of Baft were respectively equal to 1923.1, 2341.1, and 2148.1 kg/hec. On the whole Baft variety planted at 20 cm inter-row and 2 cm intra-row was the most efficient of Nigella Sativa. Manuscript profile
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  3 - Effect of planting pattern on some growth traits, seed yield and oil yield of spring rapeseed cultivars in Ardabil region
  Gholamreza Hamzehpour Ahmad Tobeh Parisa Sheikhzadeh
  AbstractsThis experiment was conducted as factorial base on randomized complete blocks design with three replications at Agriculture and Natural Resources Research Station, Samian, Ardabil in 2015. The first factor included three canola cultivars (Hyola 308, Hyola 401 a More

  AbstractsThis experiment was conducted as factorial base on randomized complete blocks design with three replications at Agriculture and Natural Resources Research Station, Samian, Ardabil in 2015. The first factor included three canola cultivars (Hyola 308, Hyola 401 and R.G.S 003), second factor was three row distances (20, 30 and 40 cm) and the third factor comprised of plant distances on row (5 and 10 cm). Results showed that the effect of cultivar was significant on traits of growth and reproductive periods, total growth period, and the number of pods per plant. Effect of cultivar and row spacing interaction was significant on seed oil, thousand seeds weight and seed yield. Also, interaction between cultivar, row spacing, and plant distances was significant on all traits except for oil yield. Spring rapeseed, Hyola 308 cultivar showed the highest seed yield (2.55 t ha-1), the highest pod per plant (338.89), and seed per plant (9536) in combination treatment of 20 cm row spacing and plant distance of 5 cm. Also, the highest oil yield (899.05 kg ha-1) was achieved by Hyola 308 planted in 20 and 30 cm row spacing. Having total period of vegetative and reproductive growth of 103 days, Hyola 308 cultivar was determined as the earliest growing cultivar. Generally, results showed that the Hyola 308, as early growing and high yielding cultivar, gained the highest oil and seed yield in combination treatment of plant spacing of 5 × 20 cm for this region. Manuscript profile
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  4 - Investigation of Polyethylene Mulch on Improvement of Tomato Water Use Efficiency using AquaCrop Model
  razieh Eskandaripour afshin khorsand vahid rezaverdinejad kamran zeinalzazdeh amir Norjoo
  In this study, the Aquacrop model was evaluated to predict the crop yield and the water use efficiency of tomato in climatic conditions Kahriz region, and use mulch cover was modeling. The research was carried out at split plot factorial experiment based on randomized d More

  In this study, the Aquacrop model was evaluated to predict the crop yield and the water use efficiency of tomato in climatic conditions Kahriz region, and use mulch cover was modeling. The research was carried out at split plot factorial experiment based on randomized design. The factors of between-row spacing (100 and 120cm), in-row spacing (30 and 40cm) and black plastic were studied. The treatment of black plastic were: full ridge and half furrow were covered by mulch; full furrow and half ridge were covered by mulch and control (no mulch). Every plot was irrigated separately. The model was calibrated by the use of first year’s data, and as a result on the base of R2 (0.99) and NRMSE (0.19). Efficiency parameters, it is obvious that Aquacrop appropriately simulates the crop yield, WUE and soil water content of the root zone for tomato under different planting densities and three types of mulch. Manuscript profile
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  5 - Optimum Planting Density of Mung Bean for Lordegan Region
  MOHAMAD HESAM SHAHRAJABIAN WENLI SUN QI CHENG LOTFALI LOTFI ALI MOLAEI
  10.30486/roce.2019.678264
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  6 - The effects of planting date and plant density on rice in Mazandaran province
  S. Moradpour E. Amiri H. R. Mobasser H. Madani
         In order to determine the best date of transplanting and plant density on yield of rice Fajr cultivar an experiment was carried out at split plot in Randomized Complete Block Design with four replications in 2009 in experimental fiel More

         In order to determine the best date of transplanting and plant density on yield of rice Fajr cultivar an experiment was carried out at split plot in Randomized Complete Block Design with four replications in 2009 in experimental field of Islamic Azad University of Chaloos. The dates of planting in 3 levels (30May,9June and 19June) as main factor and planting density in four levels (17, 34, 51, 68, plant.m 2) were considered as sub-factor. The results showed that a grain yield and harvest index 12.2 and 24.7 percent decrease. Grain yield with increase planting density until 68 plants. 10.3 percent   increase because, the number of empty grain in spike 22.5 percent decries and the number of grain and number of spike plant. 50 and 52.1 percent increase. The number of whole grain with planting density on the number of empty grain and on grain yield and biological yield in level of (%5 and  1%)., Highest yield grain for planting date June 9th with planting density 34 plants.m2 obtained. Manuscript profile
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  7 - Investigating the effect of planting density and variety on greenhouse production of cucumber (Cucumis sativus L .)
  بردیا Bayat محمدحسین Ansari مرجان Diyanat علی Mohammadi . torkashvand
  The large fluctuations of the final yield of greenhouse cucumber are of great importance in Iran due to its very large cultivated area, so that 76.47% of all greenhouses in the country are under cucumber cultivation. In order to investigate the effect of crop density an More

  The large fluctuations of the final yield of greenhouse cucumber are of great importance in Iran due to its very large cultivated area, so that 76.47% of all greenhouses in the country are under cucumber cultivation. In order to investigate the effect of crop density and variety in the production of greenhouse cucumber (Cucumis sativus), a factorial experiment was conducted in the form of a basic design of randomized complete blocks in 3 replications during 2016 and 2017. Based on this, single-flowered, double-flowered, medium-flowered and multi-flowered cucumber cultivars were cultivated in different planting densities of 37, 42 and 47 cm. The results of the research showed that the highest production productivity was achieved in the planting density of 42 cm between the plants and the selection of    multi-flowered cultivars with a maximum yield of 270 tons per hectare, and the lowest yield was obtained in single-flowered cultivars with a planting density of 37 cm. meter and numerical value of 197 tons per hectare was obtained. Therefore, the main reason for the decrease in cucumber yield in Tehran province was the selection of low-flowering cultivars with inappropriate planting density. Manuscript profile
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  8 - Effect of drought stress on some morphological characteristics of two sunflower (Helianthus annuus) hybrids at different planting densities
  Ebrahim Khalilvand Behrouzyar Mehrdad Yarnia Samad Darbandi Houshang Alyari
  Effect of drought stress on some morphological characteristics of two sunflower (Helianthus annuus) hybrids at different planting densities was investigated. The experiment was conducted as split factorial based on randomized complete block design whit three replicates More

  Effect of drought stress on some morphological characteristics of two sunflower (Helianthus annuus) hybrids at different planting densities was investigated. The experiment was conducted as split factorial based on randomized complete block design whit three replicates at research farm of Islamic Azad university of Tabriz in 2006. Treatments was Record and Azarhghol sunflower hybrids, three levels of the drought stress including  75%, 50%, 25% available moisture, and three levels of planting density including 80, 90 and 100 thousand plants ha-1. Between row spacing was 60 cm with in row spacing of 16, 18 and 20 cm, respectively for the three planting densities. The results indicated that exertion of the drought stress lead to a significant decline in plant height and diameter, sunflower head diameter and dry weight, and biomass weight per plant and per hectare (p<0.01). In addition, effect of the drought stress was thoroughly overlapped by density in the above characteristics. However, the 100% available moisture (control) in 80 thousand and 25% available moisture in 90 thousand plants ha-1 had the most and least dry weight of biomass, respectively. Azarghol hybrid had the highest plant and sunflower head diameter, while Record showed the most plant height at different drought stress levels. Height and diameter of plant and the sunflower head, dry weight of head and biomass showed significant and positive correlation with oil and seed yield per plant and hectare. Manuscript profile
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  9 - The effect of seed rate on grain yield and yield components of barley cultivars in rainfed cold regions
  Bahman Abdolrahmani Alireza Tavakoli
  10.22034/aej.2017.531469
  Abstract    To achieve the suitable seed rate and barley cultivar in cold regions, a research was conducted as factorial experiment based on randomized complete block design in three replications during 2013- 2015 at Dryland Agricultural Research Institut More

  Abstract    To achieve the suitable seed rate and barley cultivar in cold regions, a research was conducted as factorial experiment based on randomized complete block design in three replications during 2013- 2015 at Dryland Agricultural Research Institute, Maragheh Station, Iran. Three barley cultivars of Sahand, Abidar and Dayton were evaluated in 300, 400, and 500 seeds/m2 seed rates. Abidar was better than others in thousand kernel weight, green cover percentage, rainfall productivity index, and biological and grain yields. Also, the seed rate of 400 seeds/m2 was the best regarding better productivity degree, rainfall productivity index, and biological and grain yields. Interaction between cultivar and seed rate was significant in thousand kernel weight, harvest index,  productivity degree,  rainfall productivity index, grain yield, plant height, green cover percentage in flowering stage and grains number in spike. Sahad in 500, and Abidar and Dayton in 400 seeds/m2 seed rates had the highest yield. On the whole, Abidar in 400 seeds/m2 seed rate had the most green cover percentage in flowering stage, harvest index, productivity degree, rainfall productivity index, biological and grain yield, thus could be recommended for rainfed barley fall cultivation in Maragheh and other similar regions. Manuscript profile
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  10 - Effect of nitrogen fertilizer levels and row spacing on grain yield and morphological characteristics of rapeseed as second cropping after rice
  Mohammad Rabiee Mehrdad Jilani
  The effect of nitrogen fertilizer levels and row spacing was studied on grain yield and morphological characteristics of rapeseed (Brassica napus L., var. Hyola 308) as second cropping in paddy fields of Rice Research Institute of Iran. experiment was carried out for tw More

  The effect of nitrogen fertilizer levels and row spacing was studied on grain yield and morphological characteristics of rapeseed (Brassica napus L., var. Hyola 308) as second cropping in paddy fields of Rice Research Institute of Iran. experiment was carried out for two years as factorial based on a randomize complete block design with three replications. The first factor was four nitrogen fertilizer levels from urea including 98, 140, 182 and 224 kg.ha-1 .The second factor was row spacing at three levels of 20, 25 and 30 cm. In this experiment, some important growth characteristics such as plant height, number of siliques per plant, number of seeds per silique, biological yield, harvest index, grain yield, oil yield, initiation of flowering and growth periods were studied. Results of the combined analysis of variance showed that there were no significant difference for grain yield between the two experimental years. Between nitrogen levels, the treatment of 224 kg ha-1 produced maximum grain yield (2189 kg ha-1), oil yield (1001 kg.ha-1), biological yield (7142 kg.ha-1), plant height (111.9 cm) and height of the lowest silique bearing branch from soil surface (34.4 cm). Row spacing of 20 cm showed the highest grain yield (1947 kg.ha-1), oil yield (887.4 kg.ha-1), biological yield (6652 kg.ha-1) and plant height (109.9 cm). Although the interactions between nitrogen levels and row spacing was not significant, maximum grain and oil yields were obtained by application of 224kg.ha-1 nitrogen fertilizer in 20 cm row spacing. Manuscript profile
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  11 - Effect of planting pattern on yield and yield components of rapeseed cv. Zarfam
  Basir Samadi Firoozabad Ebrahim Farahani Gholam Reza Naderi
  10.22034/aej.2017.528887
  To determine the best planting pattern of rapeseed cv. Zarfam, an experiment was carried out during two years of 2010 and 2011 at Agricultural Research Station of Varamin, Iran. The experiment was in split-plot design based on complete randomized block with 12 treatment More

  To determine the best planting pattern of rapeseed cv. Zarfam, an experiment was carried out during two years of 2010 and 2011 at Agricultural Research Station of Varamin, Iran. The experiment was in split-plot design based on complete randomized block with 12 treatments and four replications. The main plots included four planting methods including one or two rows on furrow with 60 or 50 cm spacing and the sub plots included three seed rates of 6, 8 and 10 kg/ha. Combined analysis showed that interaction between planting methods and seed rates was significant on day to germinate, day of ripening, and number of silique per plant and weight of 1000 seed. Planting method of one row on furrow with 60 cm spacingcaused longest period of crop maturity, number of pod per plant, number of seed per silique, 1000 seed weightand oil percentage.Seed rate up to 8 kg had proper resultsandincreasing the number of rows and reducing space between caused decrement in yield and yieldcomponents.The method of one row planting on furrow with 60 cm spacing had the most seed number in silique and oil percentage. Also, 60 cm spacing on one row and 8 kg/ha seed rate had suitable effect on most of the studied traits would be recommendable for rapessed cv. Zarfam in this region. Manuscript profile