Phosphorus and nitrogen ions are generally le | vedclass

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(B) Soil particles are generally negatively charged. Because of this negative charge,they tend to attract and hold positively charged ions (cations) l

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(B) Soil particles are generally negatively charged. Because of this negative charge,they tend to attract and hold positively charged ions (cations) like $K^+$,$Ca^{2+}$,and $Mg^{2+}$. Conversely,negatively charged ions (anions) like $NO_3^-$ (nitrate) and $PO_4^{3-}$ (phosphate) are repelled by the negatively charged soil particles. Due to this repulsion,these anions do not bind to the soil and are easily washed away or leached out by water,especially during heavy rainfall or irrigation.

Phosphorus and nitrogen ions are generally leached from the soil because they are usually in the form of:

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