not alone
by Emerson DeƱado - Tuesday, 28 January 2020, 11:35 AM
Hi Oscar,

It varies depending on various factors such as crop residues, yield of the crop, nutrients in irrigation water, past crop, past fertilizer used and nutrient supplied by the soil. You may ask your nearest Municipal Agriculturist Office for assistance or to your Regional Soils Laboratory for proper diagnosis and nutrient recommendation. For rice farmer, you may find this website helpful:
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