أداء بعض المعدات الخاصة بتهيئة التربة تحت أنظمة حراثة و تنعيم

الملخص EN

An experiment was conducted on a farm at the College of Agriculture – University of Baghdad during 2012 in a silty clay loam soil.

New holland tractor with the following equipments (disk ridger, ditcher, land plane) were used as a machinery unit.

Studied treatments were laid out using split- split with a randomized complete block design with three replicates.

The experiment consisted of three factors, the first was plow types: disk plow, stubble – mulch plow and chisel plow which represented main plots.

Second factor was harrow types: rotary harrow, spring spike tooth harrow and disk harrow which represented sub plot's.The third factor was special equipment types: disk ridger, ditcher and land plane which represented sub – sub plots.

Slippage percentage, field efficiency, fuel consumption, soil disturbed volume as well as total cost of machinery unit was determind in this experiment.

Results obtained indicated that disk ridger with chisel plow and spring spike booth harrow recorded lower value of slippage percentage (6.503 %) with lower value of fuel consumption (21.560 l/h) while ditcher with disk plow and disk harrow recorded higher value of slippage percentage (13.920 %) with higher value of fuel consumption (39.813 l/h).

Land plane with chisel plow and disk harrow recorded higher value of field efficiency (68.413 %) and lower value of total cost of machinery unit (20028 ID/ha), mean while ditcher with disk plow and spring spike tooth harrow recorded lower value of field efficiency (60.177 %) and higher value of total cost's of machinery unit (46202 ID/ha) .Land plane with disk plow and spring spike tooth harrow recorded higher value of soil disturbed volume (2665.000 m3/h), and ditcher with chisel plow and rotary harrow recorded lower value of soil disturbed volume (1027.700 m3/h) .

It can be concluded that land plane was the best for higher value of field efficiency, higher value of soil disturbed volume with lower value of total costs of machinery unit, while disk ridger was the best for lower value of slippage percentage with lower value of fuel consumption.