Abstract The article presents the results of research conducted in order to improve accuracy and controllability driving along cotton row, which is an important factor increasing efficiency tractor semi-mounted harvesting machine. describes mathematical modeling movement guide wheels were obtained with help experimental tests.

optimum working life of tractor and farm machinery employed in potato production in hamadan province was assessed through data envelopment analysis. an input oriented model was applied to determine the optimized machinery system. in this model inputs were the lifetime of tractor as well as seven involved machines including moldboard plow, potato planter, chemical fertilizer spreader, tractor mo...

Many parameters such as dynamic load of tractor drive wheels influence the traction of tractors. An increase in dynamic load of drive wheel increases the net traction, but excess dynamic load decreases the tractive efficiency that must be avoided. Development of tractor-mounted implements due to good maneuvering and weight transfer from front axle to rear axle led to effective performance of tr...

The productivity of machine-tractor units depends on the length idle move performed in headland. Analytical dependences for determining when making T-turns by a unit with mounted machine field irregular shape have been specified article. Five types considered two variants – open turn and closed turn. Each them is carried out directions motion. A total 20 turns described. methodology specific co...

OBJECTIVES This article compares 2 variants of logging technologies at the motor-manual level: variant A - cutting and delimbing by means of a petrol chainsaw, skidding with the use of a cable winch mounted on a tractor (67-74 kW); variant B - cutting by means of a petrol chainsaw, skidding, debranching and cutting to length by means of a processor aggregated with a farm tractor (61 kW). MATE...