Soil is the component of …………

Soil that is best suited for plant growth is ………………

Biological weathering is caused by

Toxic chemicals released by paper industry are

Major sources of formation of soil is

This gas is formed on burning of wood

Ozone layer is present in this layer

“Friend of the farmer” …………

Biological remedy to clean up contamination is

Anaerobic/aerobic decomposition of biodegradable municipal and domestic wastes give