Economic and technical analysis of two tillage methods in dry and wet planting with different seed density in heavy texture
2003
Mohsenimanesh, Ahmad | Zareh, Ahmad | Zareh, Shojaat
This study was conducted to evaluate the effects of two tillage methods in dry and wet planting with different seed density for three years in Jolgeh Rokh station. Split block design in Randomized Complete Block Design with 3 replications was used in this study. Horizontal (A) factors were: A1: conventional tillage in dry and wet planting and vertical (n) factors were seed density included of: B1 = 100, B2= 250, B3= 400, B5= 700 seed in square meter. Two tillage methods were conventional (moldboard plow + harrow disk + leveler + drill planting) and reduced tillage (harrow disk in summer + deep harrow disk before planting + leveler + drill planting). In order to economic analysis, a production function was used and treatment evaluated by partial budgeting criterions. Results indicated that planting methods had significant effect at %1 level area, consequently dry planting and wet planting had 4124 kg/ ha and 3183 kg/ ha yield respectively and so dry planting method is recommended in heavy texture soils. The physical parameters analyze showed that soil bulk density in 0- 10 cm solidepth had significant effect on tillage methods at %1 level area therefore soil bulk density for reduced tillage and conventional tillage was 188 gr/ cm3 and 2.66 g/ cm3 respectively. Results of soil bulk density in 10- 20 and 20- 30 cm showed no significant effect and clod diameter had significant effect on tillage and in traction effect of planting method at %1 and %5- level area respectively. Due to these advantages, reduced tillage is recommended. For seed density results showed that no significant differences were detected among the treatment but 400 seed per square meter had the highest yield. Results of economical analyze indicated convention tillage in dry planting with 400 seed per square meter was the best while in statistical analyze reduced tillage showed the best results.
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