Effect of super phosphate and compound fertilizer applied with and without farmyard manure on soybean
1998
Thianchai Arayangkoon(Department of Agriculture, Bangkok (Thailand). Field Crops Research Institute. Chiang Mai Field Crops Research Center) | Charoon Arree(Department of Agriculture, Bangkok (Thailand). Field Crops Research Institute. Chiang Mai Field Crops Research Center) | Supat Wankruo(Department of Agriculture, Bangkok (Thailand). Field Crops Research Institute. Chiang Mai Field Crops Research Center) | Noppon Tongplew(Department of Agriculture, Bangkok (Thailand). Field Crops Research Institute. Chiang Mai Field Crops Research Center) | Malee Pungchareon(Department of Agriculture, Bangkok (Thailand). Field Crops Research Institute. Chiang Mai Field Crops Research Center)
Objective of this study was to improve soybean yield by applying chemical and organic fertilizer. Soybean cultivar CM 60 was grown in Chiang Mai by no-tillage in rice-based soils, sandy clay loam (Typic Tropaqualfs) with pH 6.4, 4.7 and 4.9, available P 9, 4 and 6 ppm in dry season, from January to April, for three years during 1994-96 respectively. Soybean seed was inoculated by Bradyrhizobium japonicum for all treatments. The results on the average from three years indicated that, the lowest yield was obtained from the treatment of no fertilizer application (check), 247 kg/rai. The grain yield slightly increased approximately 6 percent in the treatment of fertilizer 12-24-12 (N-P2O5-K2O = 36 kg/rai) applied by side dressing. Thirteen percent of yield was significantly increased from the treatment of fertilizer 0-45-0 (N-P2O5-K2O = 20 kg/rai) applied by side dressing while fertilizer 12-24-12 (N-P2O5-K2O = 36 kg/rai) mixed with farm manure (350 kg/rai) covering the seed hills showed 15 percent yield increased. The highest yield increment was obtained from the treatment of mixing fertilizer 0-45-0 (N-P2O5-K2P = 20 kg/rai) with farm manure, it was 316 kg/rai, increased about 28 percent compared with check treatment. It was therefore recommended that, soybean grown in rice-based soils, the yield could be increased by seed inoculation with rhizobium plus the application and applying the fertilizer 0-45-0 (N-P2O5-K2O) at the rate of 20 kg/rai mixing with farm manure covering the seed hill at the rate of 350 kg/rai.
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