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Phosphorus and nitrogen ions generally get depleted in soil because they usually occur asA. neutral ionsB. negatively charged ionsC. positively charged ionsD. both positively and negatively charged but disproportionate mixture

Answer» Correct Answer - B
In the soild, phosphorus and nitrogen are present as negatively charged ions, e.g., `H_(2)PO_(4)^(-),NO_(2)^(-),NO_(3)^(-)` ions. These are usually supplied by fertilisers as urea.


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