Effect of chemical fertilizer and chicken manure on growth and yield of super sweet corn grown continuously on Korat soil in Changwat Khon Kaen
1985
Mongkhon Phanitkun | Kobkiat Phaisalcharuen | Chairot Wongwiwatchai (Department of Agriculture, Bangkok (Thailand). Soil Science Div.)
The experiment was set to study the effect of factor 1, chicken manure, at the rates of 0, 2 and 4 tons/rai, and factor 2, chemical fertilizer. Chemical fertilizer 20-20-0 at 3 rates of 0, 50 and 100 kg/rai was applied for the first crop followed by 18 kg/rai of ammonium sulfate for the second crop for the latter 2 plots receiving earlier chemical fertilizer. The result for the first crop growing under rainfed condition showed that both chicken manure and chemical fertilizer increased the numbers of sweet corn cob. Chemical fertilizer significantly increased the yield of the sweet corn, the size and quality of the cob. The best treatment was the application of 2 tons/rai of chicken manure with 50 kg/rai of 20-20-0 chemical fertilizer for the first crop and followed with 18 kg/rai of ammonium sulfate in 2 split application for the second crop. The use of 100 kg/rai of 20-20-0 for only the first crop, having the effect on the weight of the husk but not on the number of pod, yielded the maximin profit of 2,966 baht per rai. On the other hand, the rate of 50 kg/rai of this fertilizer for the first crop with 18 kg/rai of ammonium sulfate for the second crop gave the highest value cost ratio of 5.33.
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