Release of available phosphorus from rockphosphates and superphosphate during incubation under submergence

Abstract

Increase in the available P (Bray 1 and 2) content of the taterite and kari soils due to the addition of P fertilizers did not depend on the water solubility of the added P fertilizers. Increasing the level of application of P from 45 to 90 kg P20s/ha did not increase the available P (Bray 1 and 2) conspicuously in the laterite and kari soils.