What measures one should take to maintain the fertility of the soil?
Following are the measures that one should take for maintaining the fertility of the soil :
(i) Crop rotation - which ensures efficient use of nutrients by all the plants.
(ii) Growing of leguminous plants as one of the crop which increases the nutrient content of the soil by fixing nitrogen.
(iii) Leaving the soil uncultivated for one or two seasons.- This helps the soil to regain its richness.
(iv) Using manure - Being organic in nature it impreoves the fertility and quality of the soil.
Why is replenishment of soil essential ? Describe two natural ways of soil replenishment.
Is it necessary to replenish forests?
List the important steps involved in nitrogen cycle in the biosphere.
List four points which one should know regarding cycling of materials.
