Observational analysis reveals decreased potassium availability with higher nitrogen in Tamil Nadu's soils, indicating moisture has little impact.
The influence of soil moisture regimes, doses of added N and their interaction on the available K content of soils was investigated under pot and field conditions in red and black. soils of Tamil Nadu with ragi (finger millet) Co. 10 as test crop. Available K Content of soils was not influenced by the soil moisture regimes. A decrease in the available K content of soils was associated with an increase in the quantum of added N. A decrease in the available K content resulted with the maturity of the crop Black soils contained greatar availahla K than the red soils.
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Muthuvel et al. (1981) studied this question.
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