Prasitthiphap khong phosphorus nai pui ammonium phosphate (16-20-0) thi tokkhang nai din na bang din.
1982
Somsak Boondown
Ammonium phosphate (16-20-0) in powder form was uniformly mixed with samples of surface soil of Bang Len and Saraburi soil series at the rate of 0, 100, 200, 300 mg P/3000 g soil. Mixtures of soil and fertilizer were incubated for 0, 1, 2, 3 cropping period of rice cultivation with water regime simulated to transplanting rice practice.
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