• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1997.12a
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• pp.61-67
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• 1997

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1998.12a
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• pp.389-394
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• 1998

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1996.06c
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• pp.393-403
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• 1996

The tractors and field crop machinery used in North American are produced by a mature industry. Recent technological innovations in include machinery for spatially -variable crop production , electronics for machine control and tractor-implement communications, low-emission and alternative fuel engines , flexible power transmission, and larger and more sophisticated equipment . Trends and issues are discussed.

• Journal of Biosystems Engineering
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• v.28 no.4
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• pp.295-304
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• 2003

In this study, a rotary equipped with devices for preventing alien substance from being wound and for preventing soil adherence were developed and their performances are evaluated in the field. The former device was effective in the paddy field with low moisture content, but power requirement of rotary tilling was increased in the field with high moisture content. In the field test of rotaries equipped with device to prevent the power requirements were measured to be 52.18, 52.44, 49.01 and 46.34 PS for general, stainless steel, rubber and PE rotaries, and the quantities of the soil adhered to rotaries, on the average, were to be 5.6, 5.7, 3.1 and 2.7 kg for general, stainless steel, rubber and PE rotaries, respectively. The PE rotary cover reduced the power requirement and soil adherence by 11 and 52%, respectively.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1996.06c
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• pp.559-568
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• 1996

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1993.10a
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• pp.192-196
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• 1993

Following the transfer of China's economy from planning to market economy, it is necessary to develop and strength the service system for agricultural mechanization . The current situation of the service system was investigated and some suggestions are proposed in this paper.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2000.02a
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• pp.141-148
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• 2000

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1996.06a
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• pp.159-164
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• 1996

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 1993.10a
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• pp.1-10
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• 1993

The social-economic development of the various countries and therefore, of the world agricultural market asks for a rationalization of the whole Agro-industrial System. In order to help the economic competitiveness of the various products, to improve their quality and to protect the environments Agricultural Engineers have to follow holistic research approaches for the whole system. The paper discusses the main problems that, in this view, Agricultural Engineers have to take into consideration.

• Journal of Biosystems Engineering
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• v.26 no.4
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• pp.323-330
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• 2001

The regular maintenance and repair status of major farm machinery such as power tiller, farm tractor, rice transplanter and combine harvester etc., were surveyed and analyzed for the full-time farmers in order to get basic information for promoting farm machinery productivity. The survey was carried out through 209 farmers from 9 provinces. The results of this study can be summarized as follows; 1. The regular maintenance of farm machinery was conducted at repair shop(49.5%) or dealer agency(12.0%), and also conducted by farmers at their house(34.9%). 2. For the status on the cleanness or exchange times of engine oil, fuel filter and air cleaner, most farmers conducted fewer times than the necessary times. And, 5.3%, 7.7%, and 2.9% of surveyed farmers experienced breakdowns due to the insufficient cleanness or exchange oil, fuel filer, and air cleaner, respectively. 3. Most farmers(76.1%) recognized the necessity of farm machinery training or education, and they preferred one week for the training period, simple or easy maintenance for the training level, agricultural technical center or farm machinery manufacturer for the training agency. 4. Complete recognition of operation manual and sufficient maintenance before-, during-, and after-operation for the farm machinery can minimize the breakdowns, enlarge the endurance prevent the safety accidents, and promote productivity of farm machinery. And, these can be accomplished by the thorough training or education for agricultural machinery.