The typical soil consists of approximately 45% mineral,
the alluvial soil consists of various proportion of sand,silt and clay.
A typical black soil is highly argillaceous with a large clay factor, 62
per cent or more, without gravel or coarse sand. It also contains 10
per cent of alumina, 9-10 per cent of iron oxide and 6-8 percent of lime
and magnesium carbonates.
laterite soil- 90-100 per cent of iron, aluminium, titanium and manganese oxides.
The desert soils consist of aeolian sand (90 to 95 per cent) and clay (5 to 10 per cent).
the red soils are poor in lime, magnesia, phosphates, nitrogen and humus, but are fairly rich in potash.
mountain soils are rich in humus,slightly acidic and fertile.lime and potash content also higher.