2004 Volume 66 Issue 5 Pages 154-163
Large scale paddy management was investigated for maintaining stability of yield and quality of rice, and for reducing environmental concerns by applying effectively slow-release fertilizers in accordance with various soil-fertility. This system is possible to reduce working hours due to the only a time application of fertilizer and the direct sowing of rice.
This system consists of four elements; first is a fertilizer application map in every 10 meters mesh size on the basis of degree of humification measured by Real-Time Soil Spectrophotometer, second is standard form to decide slow-release fertilizers in the direct sowing of rice, third is a Variable fertilizer applicator in manual correspond to a fertilizer application map, fourth is a Head-feeding combine equipped with yield sensor to make a next fertilizer application map.
