in this paper, non parametric data envelopment analysis (dea) was subjected to the energy data of wheat producers in punjab state, india, and technical, pure technical and scale efficiencies were calculated for farms both category wise and zone wise. the main objective was to determine the strength of the correlation between non-parametric efficiencies and indices such as energy ratio and speci...

ABSTRACT-In conventional agriculture, a large amount of energy is consumed in fuel consumption and depreciation of farm tractors and any other farm equipment mostly in tillage and planting operations. The main purpose of this research was to evaluate a till-planting unit equipped with three jointers. This unit was expected to act as conventional furrow openers such as shovel openers tilling the...

Establishing an automatically controlled system to obtain a maximum productivity of a bulldozer running on a weak terrain, the total traffic performance of a tracked vehicle could be clarified by use of a microcomputer in robotics from initial informations of terrain material and vehicle dimensions, Here, an useful estimation method of terrain properties : cohesion, angle of internal friction, ...

Lackas. G.M., Grisso, R.D., Yasin, M. and Bashford, L.L., 1991. Portable data acquisition system tbr measuring energy requirements of soil-engaging implements. Comput. Electron. Agric., 5: 285-296. A portable data acquisition system, using a laptop computer, was developed to monitor performancc of soil-engaging implements during field operation. The vertical and horizontal forces exerto:l by th...

The drawbar pull, travel reduction (slip), and rolling resistance are the main criteria to describe the traction behaviour of off road vehicles. Besides the engine performance, the drawbar pull is influenced by the traction conditions such as soil and the tire parameters. These traction conditions have to be described by a limited number of parameters which can be easily determined. Empirical e...

black tea sample was dried by a vibro-fluidized bed dryer to find its aerodynamic behavior and thermal performance during drying. the drying experiments were conducted at three different inlet air temperatures of 100, 115 and 130°c and fluidization condition at five vibration intensity levels of 0 (no vibration), 0.063, 0.189, 0.395 and 1.184. the results showed that bed channeling and defluidi...

cylindrical thin-walled tubes due to construction and easy installation, high energy absorption capacity are used in the automotive industry as an impact energy absorber. however, the main weakness of cylindrical tubes is in the high initial peak load. therefore, in this paper, to overcome this weakness, a buckling initiator is used at the top of the tube. this buckling initiator is a steel rod...