منابع مشابه
Assessment of Crawler Tractor Effects on Soil Surface Properties
Skidding operations can cause considerable and wide spread soil disturbance. The objective of this study was to evaluate the effects of ground skidding operations on soil compaction, moisture content, and total porosity at different levels of slope and traffic frequency. Four levels of traffic intensity (3, 8, 13, and >13 passes of a Crawler Tractor Onezhets ? 110) and three levels of slope ( ...
متن کاملDevelopment of the Safe Tractor Assessment Rating System.
We describe the development of the Safe Tractor Assessment and Rating System (STARS), a design-based tractor safety rating system that can be applied to new or used tractors to provide an objective assessment of their inherent safety features. A predictive rating system model, based on technical inspection, was used. Key principles underlying the system included the potential for design feature...
متن کاملoptimum lifetime assessment of tractor and agricultural machinery based on productivity indices, potato farms of hamadan province
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...
متن کاملLifetime risk assessment of Radium-226 in drinking water samples
Background: One of the most significant radionuclides in natural drinking waters is 226Ra and its decay products. It is potential of health problems, including cancer risk. In this study, the effect of 226Ra concentration in 28 drinking water samples collected from the North Guilan province was investigated. Materials and Methods: The activity concentrations of 226Ra were measured by using of r...
متن کاملAnalysis of Stability Control Systems for Tractor-Semitrailers
This paper summarizes a study conducted by the University of Michigan Transportation Research Institute (UMTRI) under a Cooperative Agreement between NHTSA and Meritor WABCO to examine the performance of roll stability control systems (RSC), and electronic stability control systems (ESC) for heavy truck tractor-semitrailers. The study is based on the analysis of independent crash datasets using...
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ژورنال
عنوان ژورنال: Tarım Bilimleri Dergisi
سال: 2019
ISSN: 1300-7580
DOI: 10.15832/ankutbd.403823