what is futility of soil?
Fertility is the quality or ability of soil that makes it suitable for growth of plants. Fertility of soil is determined by the presence of humus and other required nutrients in the soil. The soil rich in humus and nutrients is called fertile soil. Manures are naturally decomposed organic materials (mostly humus) that increase soil fertility. Humus is porous in nature and allows water and air to pass through. Fertilizers are mostly chemical in nature and add essential nutrients( such as nitrogen, phosphorus , potassium, etc) to soil.