منابع مشابه
Power Hop Instability of Tractors
Power hop is a “porpoising” type of pitch/bounce oscillation superimposed on the forward motion of tractors equipped with pneumatic tires. It is most often observed with tractors having two powered axles pulling towed implements in moderate to high draft field operations on dry soils. As power hop begins, the tractor exhibits gradually increasing vibration amplitudes until the operator, of nece...
متن کاملAn empirical depreciation model for agricultural tractors in Spain
This work analyses the market value of second hand agricultural tractors in Spain for the period 1999-2002, with the aims of obtaining the most appropriate valuation models (through the use of ordinary least squares regression) and proposing an empirical model that estimates the true depreciation of these vehicles. Differences in tractor depreciation were studied in terms of the three horsepowe...
متن کاملSurvey the Sleep quality in agricultural tractors drivers in different climatic conditions
Background & Objective: Among agricultural activities, working and driving with farm tractors in different weather conditions lead to fatigue and burnout. The objective of this study was to evaluate the sleep quality of farm tractors drivers in different weather conditions. Methods: From tractors drivers in Behbahan, Eqlid, and Kavar, 90 participants (Kavar: 27; Eqlid: 33; Behbahan: 30) wer...
متن کاملAppraisal of artificial neural network-genetic algorithm based model for prediction of the power provided by the agricultural tractors
The knowledge of the available power provided by the driving wheel of agricultural tractors is required to gain a correct insight into the energy management of agricultural tractors. The design of the tractors is pivotal on the maximization of the traction efficiency and simultaneous minimization of energy dissipation. This paper spearheads the synthesis of the power provided by the agricultura...
متن کاملT.Kobayashi. “How to Reduce Manufacturing and Management Costs of Tractors and Agricultural Equipment”. Agricultural Engineering International: the CIGR
The free trade and marketing across borders of food and agricultural products have reduced their prices, and have consequently been pushing down the prices of agricultural machinery. Utilizing the worldwide industrial infrastructure, the manufacturing industry, including agricultural machinery manufacturers, has expanded the worldwide sourcing of materials and components and complied with such ...
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ژورنال
عنوان ژورنال: Ciência Rural
سال: 2020
ISSN: 1678-4596,0103-8478
DOI: 10.1590/0103-8478cr20200199