Research on actual conditions of fertilizers applications based on farmer's paddy fields by regions
1986
Lee, C.S. | Hwang, S.W. | Park, J.K. | Kim, M.S. (Rural Development Administration, Suwon (Korea R.))
The investigation was conducted to find out amounts and ratios of N, P and K fertilizers applied on rice in 410 farmers' fields. The application ranges of N, P and K fertilizers, respectively, were 15.4 - 16.3, 7.6 - 8.0 and 8.2 - 8.5 kg/10a for high yielding varieties, and 13.1 - 13.8, 7.0 - 7.1 and 6.4 - 7.7kg/10a for ordinary varieties. N fertilizer was applied in the ratio of 56 % at basal dressing, 34 % at tillering, 9 % at panicle formation and 1 percent at heading stage. The amounts of soil amendment application were 179 - 192kg/10a for silicate, 1,031 - 1,360kg/10a for compost, 420-540kg/10a for rice straw, and 17.8-25.2 ton/10a for red earth
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