Kan chaipui thimosom choeng setthakit nai kanphalit thua luang.
1986
The analysis concluded that as much as 98.44 percent of the phosphate fertilizer effect was due to the soybean crop and the rest of 1.56 percent effect was explained. A maximum yield response of 343 kilograms of the crop may be reached using 57 kilograms per rai of double superphosphate (40 percent P2O5). The optimum fertilizer application rate was found to be 44.2-49.5 kilograms per rai of the phosphate fertilizer and the soybean production of 330.56-338.07 kilograms per rai was attainable. By this, the fertilizer added 217.56-225.07 kilograms of soybean to the production along with a value added of 1,305.36-1,800.56 B per rai. Thus, there was a net return of 677.57-1,225.23 B or 107.93-212.96 percent over the fertilizer investment.
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