To study the effect of nitrogen fertilizer application according to soil analysis urea fertilizer is type 2 and ammonium sulphate fertilizers that affect growth. Yield and protein in kernels of corn, animal-breeding Pacific at 999 in kamphaeng Saen.
To study the effects of nitrogen fertilization based on soil analysis, two types of urea and ammonium sulfate. Affecting growth. Yield and protein content of seeds of maize varieties grown in the Pacific, 999 soil KPS.
To study the effects of fertilizer based on soil analysis 2 type is, urea and ammonium sulfate fertilizer on Growth Yield and protein content in grain of Maize Varieties in the Pacific 999 planted in the soil was extremely expensive