Tractor is a system for understanding English messages within the context of hard and soft information fusion for situation assessment. Tractor processes a message through text processors using standard natural language processing techniques, and represents the result in a formal knowledge representation language. The result is a hybrid syntactic-semantic knowledge base that is mostly syntactic...

Bates et al. extended the "tax-adjusted reSelf-employment taxes, "effective" marginal placement model" by incorporating the interactax rates, and discounting schemes which allow ton between taxes and inflation in their study. for alternative purchase and disposal dates of They found that inflation increased the magnimachinery are incorporated into the traditional tude of costs and generally ext...

Since the mid 1990’s, advances in global positioning systems (GPS), microprocessors, actuators, controllers, plant/soil sensors and geographical information systems (GIS) have spawned the development of new, site-specific, variablerate techniques for chemical applications. At the same time, agricultural production has embraced other new technologies that increase the productivity of mechanized ...

CVETANOVIC, B. and D. ZLATKOVIC, 2013. Evaluation of whole-body vibration risk in agricultural tractor drivers. Bulg. J. Agric. Sci., 19: 1155-1160 During their work, agricultural tractor drivers are exposed to various negative influences, among which vibrations are especially harmful. It is about vibrations generated in engine while the tractor is working, which are then transmitted to the dri...

The South African sugar industry moves 74% of the annual crop by road transport. As fuel prices continue to rise there is therefore a need to investigate the effects of load size and tractor size on the fuel consumption and the productivity of transport units. Tests have been carried out to evaluate the effects of these parameters for the tractor sizes most common in the sugar industry. Results...

We describe the successful application of a SLICOT subroutine in a control engineering problem. Based on GPS data it is possible to automatically steer farm vehicles along a prescribed trajectory. The bottleneck for the successful on-line implementation of a LQG regulator is the numerical solution of a discrete-time algebraic Riccati equation in real-time and at high accuracy. This is achieved ...

Introduction Direct energy expenses (diesel, gasoline, propane, electricity) total more than $1 billion annually for Iowa farmers. Farm management techniques such as adjusting tractor gear and throttle settings or reducing tillage depths can reduce diesel fuel consumption for row crop production. This study is being conducted over multiple years to measure the effects of energy management techn...

Accurate guidance of towed implements is important for performing agricultural field operations and for gaining the ultimate benefit from an agricultural automatic guidance system. The study of open and closed loop system responses can be helpful in the design of practical guidance controllers. A dynamic model of a tractor and a towed implement system was developed. Open loop analysis of the ki...