High solidity wind rotor works on ____?

‘Chroma’ variable in determination of soil colour represents

Most limiting factor for crop cultivation in desert areas is

Which one of the following is an aerobic non-symbiotic nitrogen-fixing bacteria?

Which master horizon of soil is known as the zone of illuviation?

The rate of decomposition of organic matter is negatively affected by the presence of

The chemical used to remove organic matter from the soil during mechanical analysis is

The potential difference between the fixed and mobile part of double layer in soil colloids is known as

Available water for plant indicates water held in

Process of intermixing of soil horizons by external factor is called

Weight of one hectare furrow slice of root zone depth soil is about