Volcanic soils:

A. Aridisols
B. Gelisols
C. Endsols
D. None of the above

Soil-forming minerals occurring in rocks do not contain any water, they undergo ______________ when exposed to humid conditions & break down as in chemical weathering process:

A. Carbonation
B. Acidification
C. Hydration
D. Dissolution

Soil is a variable mixture of Major components:

A. Solids
B. Liquids
C. Gases
D. All of the above

The soil air contains a number of gases ______________ & water vapours:

A. Nitrogen
B. Oxygen
C. Carbon dioxide
D. All of the above

Igneous rocks are called:__________?

A. Primary rocks
B. Secondary rocks
C. Aqueous rocks
D. None of the above

Transportation & cementation of primary rocks:

A. Sedimentary rocks
B. Secondary rocks
C. Aqueous rocks
D. All of the above

Metamorphic rocks are classified into:___________?

A. Foliated metamorphic rocks
B. Non-foliated metamorphic rocks
C. Both a & b
D. None of a & b

In land capability classification, class I-Iv are suitable for:_________?

A. Suitable for grazing
B. Suitable for forestry
C. Unsuitable for any agricultural use
D. Suitable for cultivated farming

Essentiality criteria of an element :

A. In the absence of an element, its not possible for plant to complete its vegetative cycle.
B. The role played by an element is specific & can not be replaced by another element.
C. The element is directly involved in the nutrition of the plant.
D. All of these

Nutritive elements needed in large quantities to ensure normal plant development:

A. N, p, k
B. S, mg, ca, fe
C. Both a & b
D. None of a & b