Predicting the maintenance and management costs and replacement age of tractors in agricultural mechanized units, is important from several points. So, doing a timely agricultural operations, more accurate measure of the amount of income  including the cost of these items , determining the useful life of old tractors , replacement age, cost of the process changes and the possibility of examinin...

OBJECTIVE The purpose of this systematic review was to evaluate the effectiveness of roll-over protection structures (ROPS) as an engineering control for prevention of fatalities from farm tractor roll-overs. METHODS Using a systematic approach to literature searching, relevant studies from peer-reviewed journals, technical and government reports, and unpublished reports were retrieved. Studi...

Energy plays a significant role in today's developing societies. The role of energy demands to make decisions and policy with regard to its production, distribution, and supply. The vital importance of energy, especially fossil fuels, is a factor affecting agricultural production. This factor has a great influence on the production of agricultural products in Iran. The forecast of the con...

The article is devoted to the study of methods and means that help improve traction characteristics power vehicles, in particular tractors, when performing combined operations soil treatment. analyzes impact weight distribution, tire pressure, use special devices on quality tillage operations. It was established efficiency depends level tool. To increase tractor, it proposed mathematical increa...

The aim of this paper and its sequel is to introduce and classify the holonomy algebras of the projective Tractor connection. After a brief historical background, this paper presents and analyses the projective Cartan and Tractor connections, the various structures they can preserve, and their geometric interpretations. Preserved subbundles of the Tractor bundle generate foliations with Ricci-f...

In order to solve the labor shortage problem, unmanned agricultural vehicles have been widely promoted in China. Among these vehicles, tractor-trailers garnered most interest thanks their flexibility and efficiency. However, trapped by factors of vehicle parameter uncertainties, unstructured farmland roads, etc., current shown poor tracking accuracy longer online times straight-line path tracki...

In order to investigate the eff ect of transition of mounted implements from operation to transport on longitudinal stability of a tractor that works on sloping land, a mathematical model was developed. In this model two operation modes for a mounted chisel plow were considered: penetration of the plow into the soil and depth reduction of it, and the eff ects of transferred forces and torques f...

Abstract Advanced technology has entered the agricultural sector in an effort to streamline production. Mechanization, one of advanced contribution increase productivity and resource’s efficiency agriculture. However, there is a need government’s intervention accelerate it. One mechanization program by government Agricultural Machinery Services Business (UPJA) which applied farmer group level I...