The bacteria responsible for oxidizing Fe²⁺ to Fe³⁺ (ferrous to ferric form) under an acidic environment 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

Which one of the following is the soil order of old alluvial soils?

Soils of which textured class have minimum water holding capacity?

What is the C:N ratio of normal soil?

Keen's box is used to determine which of the following properties?

Under saturated condition, the soil water potential is

Under what condition denitrification is a major mechanism of nitrogen loss from the soil?