Weathering process in nutrients management capacious influence the availability?

Which one of the following is a 2:1 non-expanding clay mineral?

The K-bearing mineral dominated in soils is

The most important chemical weathering process of rock is

Shale on metamorphism changes to

Biotite is an example of which type of rock-forming mineral?

The volume composition of soil which gives optimum condition for crop growth is

Cation exchange capacity of Kaolinite is