Rice

As rice is predominantly cropped under traditional methods, imbalanced fertilization is frequently observed. Rice can be cropped on various soil types; in a flooded system soils are generally deep clay soils with a high CEC, whereas in rain-fed cultivation soils are often poor.

A standard production (5 to 6 t/ha) requires 120 kg N/ha, 35 kg P2O5/ha and 160 kg K2O/ha. Phosphorus is applied before planting. Nitrogen and potassium are applied in split applications along the cropping period to ensure a better efficacy.