List of Articles seeding rate

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  1 - Effect of Management Operations on the Thermal Time of Velvetleaf (Abutilon theophrasti Medicus.) Emergence in Soybean (Glycine max L.)
  rahman khakzad Mohammad Taghi Alebrahim Mostafa Oveisi
  In order to evaluate the effect of different management practices on the emergence time of vevetleaf, a split-split plot experiment was conducted in a completely randomized block design with three replications in Dasht-e-Naz Sari in 2016 and 2017. Two tillage systems (C More

  In order to evaluate the effect of different management practices on the emergence time of vevetleaf, a split-split plot experiment was conducted in a completely randomized block design with three replications in Dasht-e-Naz Sari in 2016 and 2017. Two tillage systems (Conventional tillage and no-till), three soyabean seeding rates (200,000; 300,000 and 400,000 seeds ha-1), and three doses of imazethapyr (SL 10%) (0, 50, and 100 g ai ha-1) were considered as experimental factors. The velvetleaf emergence was significantly affected by management practices including tillage system, soybean seeding rate, and imazethapyr dose. No-till system, a density of 400 000 seeds ha-1 and a 100 g a.i. ha-1 imazethapyr dose not only resulted in the lowest velvetleaf seedling density m-2 but also caused the longest delay in the time to reach 50% of seedling emergence, thus resulting in a long lag phase of velvetleaf emergence early in the season. Findings from our study may facilitate the development of effective P. oleracea management strategies. Manuscript profile
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  2 - The Effect of Conventional and Conservation Tillage Methods on the Improvement of Wheat Yield in Different Planting Dates and Seeding Rates
  Nosratolla Haidarpour Raham Mohtashami Amin Namdari
  10.30495/sarj.2022.1962341.1078
  Production in areas under rainfed cultivation is always associated with different constraints that among them, changes in precipitation and air temperature from year to year are widespread and uncontrollable. In this regard, the current study was conducted in order to c More

  Production in areas under rainfed cultivation is always associated with different constraints that among them, changes in precipitation and air temperature from year to year are widespread and uncontrollable. In this regard, the current study was conducted in order to compare conservation and conventional tillage methods on wheat yield in sowing dates before and after effective autumn rainfall. The experiment was carried out as split-split plots based on a randomized complete block design with 3 repetitions in two years 2018 to 2020. Experimental treatments included planting time as main plots with two levels D1= before rainfall and D2= after rainfall tillage method as sub-plots including T1= conservative and T2= conventional and seeding rate as sub-sub-plots including S1= 200, S2=300 and S3= 400 seeds. The results demonstrated that although the planting date and seeding rate had no significant effect on the studied traits, the values obtained from the cultivation before rainfall and under 300 and 400 seeding rates were remarkably better. Tillage method caused a significant difference in grain yield and biomass of treatments 3634 and 8394 kg. ha-1, respectively, whereas conventional tillage the values were 2819 and 6114 kg. ha-1. Conservation tillage and cultivation before rainfall associated by using 300 seeds/m2 led to the highest values in number of plants, spikes, and 1000-grain weight compared to conventional method and cultivation before rainfall. Consequently, considering the cost of production, pre-autumn rainfall sowing under conservation tillage and with a 300 seeds/m2 is recommended for Gachsaran region. Manuscript profile
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  3 - Response of Three Bread Wheat Cultivars to Different Levels of Seeding Rates in Ilam Region
  A. Maleki P. Seyedan A. Tahmasbi
  In order to study the effects of seeding rates on yield and yield components of three bread wheat cultivars, a factorial experiment based on randomized complete block design (RCBD) with 3 replications was conducted during 2006-2007, in Sarableh town, Ilam province, Iran More

  In order to study the effects of seeding rates on yield and yield components of three bread wheat cultivars, a factorial experiment based on randomized complete block design (RCBD) with 3 replications was conducted during 2006-2007, in Sarableh town, Ilam province, Iran. Three cultivars, were Chamran, Chanab, and Falat and four seeding rates were 200, 300, 400, and 500 seeds per m2. Results showed that, the differences among cultivars and seeding rates were significant for 1000 seeds weight, harvest index, and phenological traits, using 400 seeds per m2. Chamrans produced highest harvest index and Chanab at seeding rate of 200 seeds per m2 had the lowest harvest index. Falat produced the highest seed yield (5600 kg/ha) at 400 seeds per m2 and Chanab the lowest seed yield (3800 kg/ha) at 500 seeds per m2. The highest correlation coefficients were observed between seed yield, harvest index (r=0.84**), seed numbers per spike (r=0.79**) and 1000 seeds weight (r=0.59*). Manuscript profile
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  4 - Effect of Row Spacing and Seeding Rate on Forage Yield Local Alfalfa, c.v. Gara Yonjeh (Medicago sativa)
  A. Salek Zamani A. FakhrVaezi
  To identify suitable seeding rate and row spacing and their interaction effects on local alfalfa (Gara Yonjeh C.V.) forage yield, this experiment was carried out at Maragheh Dryland Research Station for four years. Experimental design was strip plot with 4 replications. More

  To identify suitable seeding rate and row spacing and their interaction effects on local alfalfa (Gara Yonjeh C.V.) forage yield, this experiment was carried out at Maragheh Dryland Research Station for four years. Experimental design was strip plot with 4 replications. Row spacing was assigned to horizontal plots (A1= 25 cm, A2= 30 cm, A3= 40 cm) and seeding rate to vertical plots (B1= 15 kg/ha, B2= 20 kg/ha, B3= 30 kg/ha, B4= 40 kg/ha). The Combined analyses of data in 3 years showed that there were significant differences between row spacing but there were not significant differences among seeding rates. Interactions of row space × seeding rate were not significant. Means comparisons showed that yield of A1B3 entry (row space=25 cm, seed rate=30 kg/ha) with 3135 kg/ha dry forage and 5653 kg/ha wet forage was higher than the yields of other entries. Relation of Yield related to rainfall was found to be a polynomial function.  Manuscript profile
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  5 - Evaluation of palnting season and plant density on yield and yield component of lentil(cv.Gchsaran) in dryland condition
  payam pezeshkpour
  In or order to determine optimum seed density and sowing time of lentil (lens culinaris medic.) in khoramabad city, this study was conducted in 2008-2009 growing seasons. There were five seed density levels 200, 250, 300, 350 and 400 seed/m 2 , and two sowing seasons: A More

  In or order to determine optimum seed density and sowing time of lentil (lens culinaris medic.) in khoramabad city, this study was conducted in 2008-2009 growing seasons. There were five seed density levels 200, 250, 300, 350 and 400 seed/m 2 , and two sowing seasons: Autumn and spring seasons traits such as grain yield, biological yield, pod and grain numbers per square meter, single seed per square meter; double seed per square meter were recorded. After harvesting, 100 grain-weight, grain yield and biological yield were measured and recorded. Analysis of variance showed that the effect of sowing dates on grain yield, biological yield, pod and grain numbers per square meter, single seed per square meter; double seed per square meter, were significant. Autumn sowing date significantly increased grain and biological yield, harvest index, pod and grain numbers per square meter. Different plant density effects were also significant on grain yield The highest grain yield belonged to 350 seed per m2 (1600 kg/ha-1) and autumn sowing time. (1575 kg/ha-1). These results recommend that in dry land conditions of lorestan lentil are to be grown as autumn crop with 300 seed per m2. Manuscript profile