نتایج جستجو برای: shank chisel plow working at 30 cm depth in sandy
تعداد نتایج: 17476177 فیلتر نتایج به سال:
in this study, scour of mashkid bridge pier located in mashkid river of saravan county has been studied and to measure the scour rate, the numerical model hec-ras 4.0 has been used. upon selection of mashkid river as the case study and whereas the studied zone is important with respect to the climatic conditions and showery monsoon raining and flowing the great and destructive floodwaters, ther...
Methods of seedbed preparation affect establishment, growth and yield of crops via manipulating physical and chemical properties of soil. These effects on wheat-mungbean double-cropping have not been studied in Isfahan. Therefore, the influences of various seedbed preparation methods on soil physical properties and nutrients content and on establishment of mungbean (experimental line 1-61-16) w...
This study was conducted to study and compare the effects of different tillage systems on soil physical properties and wheat yield in dryland conditions. The experiment was carried out in Maragheh Dryland Research Station with 5 treatments and 4 replications based on RCBD for 3 years (2001-2003). The results showed that difference between the treatments in terms of wheat yield was significant, ...
Traditionally, most corn field in Hamedan Province is prepared for planting by moldboard plowing followed by a number of secondary tillage operations. In recent years conservation tillage systems have become more popular. This research was conducted in the form of a split plot experimental design with six tillage treatments and three replications. Main tillage methods including: (T1) convention...
This paper presents the interaction system within mechanical soil processing process, consisting of two large elements, metal tool and soil. Due to main forces acting on chisel knives—friction impact with sandy soil—the wear these knives was determined. To determine wear, a stand used which allowed testing chisel-type in laboratory conditions by changing their functional parameters: working dep...
A multi-year experiment was conducted to compare the effects of conservation tillage (no-till and ridge-till) with conventional plow tillage on organic C, N, and resin-extractable P in an alkaline semi-arid subtropical soil (Hidalgo sandy clay loam, a fine-loamy, mixed, hyperthermic Typic Calciustoll) at Weslaco, TX (26890N 978570W). Tillage comparisons were established on irrigated plots in 19...
Soil erosion from agricultural lands can be reduced by adoption of conservation management practices. The objectives of this study were to investigate the effectiveness and cost-benefit of conservation management practices on sediment reduction under a corn–soybean rotation. The experimental site was 6.4 ha (15.8 ac) and located within the Four Mile Creek watershed in eastern Iowa. Management p...
This research aimed to modify the rotary plow into a bed-making tool. The performance test of tool was carried out on sandy and loamy land by experimental method. dimensions bed including length, width, height as well time are also measured in test. has total length 182 cm, right left sides each 51 width 25 cm 30 cm. four-wheel tractor at distance 10 m m, making performed 5 times. Experimental ...
Abstract Chisel plows with a chisel as working body, loosen the soil without mixing layers. The analysis of conducted research concludes that most widespread is cylindrical surface body - constant radius curvature. It theoretically established at curvature bit up to 0.1 m, on will move chaotically, while does not affect percentage wrapped plant debris. As increases, force inertia decreases, the...
abstract conservation tillage practices integrated with appropriate residue management is an efficient approach in sustainable agriculture to prevent the removal or burning of crop residues. two years field experiments were conducted to evaluate the effect of wheat residue management on yield, yield component and morphophysiological characteristics of corn. experimental design was split plot us...
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