define soil and what are the main factors of depletion of soil
Answers
Hi dear brainly user
Soil may be defined as the upper layer of earth in which plants grow, a black or dark brown material typically consisting of a mixture of organic remains, clay, and rock particles.
main causes/factors of depletion are...
1. Physical factors, e.g. loss of fertile top soil due to water or wind erosion.
2. Chemical factors e.g. depletion of nutrients or the toxicity due to acidity or alkalinity (salinization) or water logging.
3.Biological factors which affect the micro-flora and reduce the microbial activity of the soil. These factors reduce the yield.
4.Deforestation, extensive cultivation on marginal land, improper cultivation practices like mono-cropping, poor manuring, misuse of fertilizers or excess use of fertilizers, excessive irrigation, over-grazing, fragility of soil, adverse weather and mining may also accelerate the process of soil degradation.
Hope it helps U.