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Optimum Nitrogen Fertilization Based on Soil Testing for Rice Cultivation in Different Paddy Soils
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 Title & Authors
Optimum Nitrogen Fertilization Based on Soil Testing for Rice Cultivation in Different Paddy Soils
Choi, Yong-Jo; Lee, Seong-Tae; Kang, Jin-Ho; Lee, Young-Han;
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 Abstract
Environment friendly agriculture is nowadays a major fiend to sustain balanced agricultural ecosystem, keeping its productivity. This study was conducted to determine the optimum levels of nitrogen (N) application for improving rice productivity and reducing N loss through N application based on soil diagnosis. four levels of N were applied with 0, 50, 100 and 150% of recommended levels by soil testing in 4 different paddy soils (i.e. normal, sandy, ill-drained and immature soils). Across N treatments, the greatest grain yield was observed in sandy soil and the lowest in ill-drained soil. The grain yield tended to decrease with increasing N application from 50% to 150% of recommended levels, except ill-drained soil. To ensure maximum yield the optimum levels of N application were estimated at 120 kg, 153 kg and 173 kg in normal, immature and sandy soil, respectively.
 Keywords
Rice;Nitrogen;Soil testing;Soil type;
 Language
Korean
 Cited by
 References
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