INDIAN GEOGRAPHY

Detailed explanation-1: -A: We say that it takes 500 to thousands of years to create an inch of topsoil. The reason is that soil is often derived from rock. The rock has to be broken into small pieces first. This happens by physical weathering: things like freezing and thawing in colder climates, and chemical weathering in warmer climates.

Detailed explanation-2: -The accumulation of material through the action of water, wind and gravity also contributes to soil formation. These processes can be very slow, taking many tens of thousands of years. Five main interacting factors affect the formation of soil: parent material-minerals forming the basis of soil.

Detailed explanation-3: -It takes about 1000 years to form a 25 cm thick of soil.

Detailed explanation-4: -Plant roots with their symbiotic mycorrhizal fungi are also able to extract nutrients from rocks. New soils increase in depth by a combination of weathering, and further deposition. The soil production rate due to weathering is approximately 1/10 mm per year.

Detailed explanation-5: -It takes about 1000 years to form a 25 cm thick layer of soil is false. EXPLANATION: It is discovered that the formation of 1 inch of top soil takes about 500 to 1000 years. Different rocks take different amount of time to break into soil particles.