Aliakbar Solhjou; Mohsen Bazrafshan; Farrokhdin Ghezeli
Abstract
Weed control by mechanical means can reduce environmental concerns resulting from herbicides application, and also it can help reducing the costs of chemicals and application expenditures. This study was devoted to investigate the suitability of bent leg cultivator for eradication ...
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Weed control by mechanical means can reduce environmental concerns resulting from herbicides application, and also it can help reducing the costs of chemicals and application expenditures. This study was devoted to investigate the suitability of bent leg cultivator for eradication of weeds in sugar beet fields. Field study having seven treatments; bent leg cultivator with 45 mm width, bent leg cultivator with 45 mm width + furrower, bent leg cultivator with 65 mm width, bent leg cultivator with 65 mm width + furrower, conventional cultivator (crescent blade), control of weed in all seasons, and no-weed control were carried out as a complete randomized design in three replications. Field data were used to calculate weed control percentage, sugar beet root yield, sugar content and gross sugar yield. Analysis of data indicated that cultivator geometry affected both percentage of weed control and crop yield. The bent leg cultivator with 65 mm width + furrower, compared to conventional cultivator, increased weed controling (17.0%), root yield (5.5%), sugar content (0.6%), and gross sugar yield (6.1%). Findings showed potential of the new bent leg cultivator in increasing crop yield and decreasing herbicides application.
Aliakbar Solhjou; Seiid Mansur Alavimanesh
Abstract
The factors influencing the efficiency of tillage tools are such as soil moisture content, tool geometry and forward speed. This study was a spilit-spilit plot experimental design with three replications to determine the effect of new bent leg tillage on soil pulverization. Treatments were three soil ...
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The factors influencing the efficiency of tillage tools are such as soil moisture content, tool geometry and forward speed. This study was a spilit-spilit plot experimental design with three replications to determine the effect of new bent leg tillage on soil pulverization. Treatments were three soil moisture content levels of 7-10, 10-13 and 13-16 as the main plots, three forward speeds of 5, 7.5 and 10 km/h as the sub-plots and three blade spaces of 12, 16 and 20 cm as the sub-sub-plots. In this research, the effect of bent leg tillage on soil moisture content, forward speed and clod mean weight diameter (MWD) were studied. Results indicated that forward speed, shank spaces and soil moisture content during tillage affected MWD. Increasing forward speed and soil moisture content during tillage and also reducing blade spaces reduced MWD. The findings show that the technology of the new bent leg tillage has the potential to increase forward speed during tillage operation with reducing MWD. Also, it can improve work-rate and reduce the time of seed-bed preparation.
Ali Akbar Solh-Jou; Mohammad Reza Jamali; Ladan Joukar
Abstract
Mechanical weed control in field can reduce the environmental issues due to using herbicides and the cost of them. This study was a conducted in the form of randomized complete block experimental design with six treatments and four replications in Zarghan of Fars Province to determine the effect of opener ...
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Mechanical weed control in field can reduce the environmental issues due to using herbicides and the cost of them. This study was a conducted in the form of randomized complete block experimental design with six treatments and four replications in Zarghan of Fars Province to determine the effect of opener geometry on weed seeds bank. Treatments were bent leg opener, narrow point opener with rake angles of 53° and 90°, sweep opener, disc opener and moldboard plow (control). In this project, weed seeds bank and weed seeds location in soil was studied. Results indicated that opener geometry affected on weed seeds translocation. The bent leg opener had the highest and the lowest weed seeds percentage in the soil surface and deeper layers with 26.7% and 7.4%, respectively. However, moldboard plow had the lowest and the highest weed seeds percentage in the soil surface and deeper layers with 12.7% and 14.8%, respectively. This is show that the bent leg opener reduced vertical displacement of weed seeds in soil and also reduced weed seeds translocation from surface to depth of soil. Therefore, the bent leg opener can reduce weed seeds bank in the long time.
