the purpose of this research was to study and predict fuel consumption rate of tractor due to different aspect ratios of chisel plow blade and to determine a general relationship equation between aspect ratio ( ) and fuel consumption rate.  an itm-399 (81 kw) tractor and a mounted-type chisel plow with 9 shanks were used. the 5 and 10 cm width chisel blades were used. the experiments were condu...

Nacrtak Over the last decades many Mediterranean sites were planted with conifers, which offered fast growth, good fibre quality and the capacity to grow on poor soils. If not thinned, these stands cannot develop strong and healthy trees and they become vulnerable to stress agents. The authors designed a complete operation for the thinning of conifer plantations under favourable terrain conditi...

The driving wheels affect the tractive efficiency, fuel consumption, and soil compaction. This study presents fatigue analysis of a spike segment that is main part an innovative designed to improve tractor performance. design improvement was proposed for Chernozem allowing full penetration spikes. loaded by forces resulting from maximum drawbar pull at 100% wheel slip penetrometer resistance. A...

BACKGROUND Agricultural tractor overturns without rollover protective structures are the leading cause of farm fatalities in the United States. To our knowledge, no studies have incorporated the spatial scan statistic in identifying high-risk areas for tractor overturns. The aim of this study was to determine whether tractor overturns cluster in certain parts of Kentucky and identify factors as...

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...