Answer:
The ability of soil to supply all the essential plant nutrients to a crop in adequate quantity is called soil fertility. Repeated growing of crops in the same soil removes various nutrient elements from the soil due to which the soil loses its fertility. The soil fertility can be replenished by the following methods: (i) By keeping the field fallow for one or two seasons. (ii) By putting manure and fertilizers in the soil. (iii) By practising crop rotation. (iv) By practising multiple cropping (Mixed cropping).
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