Additional and exciting technological developments are taking place in tractor design with emphasis on precision farming, communications and information technologies. These are intended to enhance performance and take account of energy conservation, environmental protection and sustainability considerations. The modern tractor is reviewed in detail in Tractors and Transport (EOLSS on-line, 2002).
Major crop nutrient fertilizers (nitrogen, phosphorus and potassium (NPK)) are typically applied in powdered (small particles), granular (larger particles) or in liquid form either as individual or as compound fertilizers. The fertilizer may be applied using a combine (corn) drill where the seed is contained in one hopper and dry fertilizer in another behind it.

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Additional and exciting technological developments are taking place in tractor design with emphasis on precision farming, communications and information technologies. These are intended to enhance performance and take account of energy conservation, environmental protection and sustainability considerations. The modern tractor is reviewed in detail in Tractors and Transport (EOLSS on-line, 2002).
Major crop nutrient fertilizers (nitrogen, phosphorus and potassium (NPK)) are typically applied in powdered (small particles), granular (larger particles) or in liquid form either as individual or as compound fertilizers. The fertilizer may be applied using a combine (corn) drill where the seed is contained in one hopper and dry fertilizer in another behind it.

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