한국농업기계학회:학술대회논문집 (Proceedings of the Korean Society for Agricultural Machinery Conference)
- 한국농업기계학회 2000년도 THE THIRD INTERNATIONAL CONFERENCE ON AGRICULTURAL MACHINERY ENGINEERING. V.II
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- Pages.236-245
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- 2000
Determination of Variable Rate Fertilizing Amount in Small Size Fields Using Geographic Information System
- S. I. Cho (School of Biological Resources and Materials Engineering College of Agriculture and Life Sciences, Seoul National University) ;
- I. S. Kang (School of Biological Resources and Materials Engineering College of Agriculture and Life Sciences, Seoul National Universit) ;
- Park, S. H. (School of Biological Resources and Materials Engineering College of Agriculture and Life Sciences, Seoul National University)
- 발행 : 2000.11.01
초록
The feasibility of precision farming for small sized fields was studied by determining fertilizing amount of nitrogenous and calcareous to a cite specific region. A detailed soil survey at three experimental fields of 672㎡, 300㎡ and 140㎡ revealed a considerable spatial variation of the pH and organic matter(OM) levels. Soil organic matter was measured using Walkley-Black method and soil pH was measured with a pH sensor. Soil sample was obtained by Grid Node Sampling Method. The soil sampling depth was 10 - 20 cm from the soil surface. To display soil nutrient variation, a soil map was made using Geographic Information System (GIS) software. In soil mapping, soil data between nodes was interpolated using Inverse Distance Weighting (IDW) method. The variation was about 1 - 1.8 in pH value and 1.4 -7 % in OM content. Fertilizing Amount of nitrogenous and calcareous was determined by the fertilizing equation which was proposed by National Institute of Agricultural Science and Technology.(NIAST). The variation of fertilizing amount was about 3 - 11 kg/10a in nitrogenous and 70 - 140 kg/10a in calcareous. The results showed a feasibility of precision fertilizing for small size fields.
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