Efficiency of some selected organic wastes as nitrogen fertilizer for sweet corn in Kamphaeng Saen soil series
1993
Supamard Panichsakpatana | Jameekorn Srisumol (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Soil Science)
Three kinds of organic waste materials (OWMs) were used to test their efficiency as N fertilizer for sweet corn planted in Kamphaeng Saen soil. They were castor meal, activated sludge from beer brewery factory and rice straw compost. They were used separately as sole N source or splitly half by half with ammonium sulfate in order to reach the 15 kgN/rai of the recommended rate by the Dept. of Agriculture. The test was set as field experiment with RCBD 4 replicates. The experimental results indicated that OWMs incombination with inorganic fertilizer (IF) was proved to be very effective in terms of improving growth and yield superior than, or at the least comparable to, sole chemical N fertilizer. Among the OWM+IF combination, the combination of IF with rice straw compost was overall better than the others in terms of corn yield, straw weight, total ear weight, number of total ears, number of good ears, tasselling and silking dates. Sole application of OWMs was more or less effective as the chemical fertilizer. All of the above treatments were proved to be significantly better than no N fertilizer.
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