Cultivable Wasteland refers to lands that are cultivable but not cultivated for more than five years. It comprises all lands available for cultivation, but not taken up for cultivation. Next to fallow lands, cultivable wastelands are important for agricultural purposes because they can be reclaimed through conversational practices or cultivation or grazing or aggro-forestry.

Correct Option: D

Cultivable Wasteland refers to lands that are cultivable but not cultivated for more than five years. It comprises all lands available for cultivation, but not taken up for cultivation. Next to fallow lands, cultivable wastelands are important for agricultural purposes because they can be reclaimed through conversational practices or cultivation or grazing or aggro-forestry.

Soil erosion in a desert region can be checked by tree plantation and afforestation.

Correct Option: A

Soil erosion in a desert region can be checked by tree plantation and afforestation.

The significant quantity of upper soil is formed by Sedimentary rock.

Correct Option: B

The significant quantity of upper soil is formed by Sedimentary rock.

Humus refers to the decomposed and partly decomposed organic matter or animal and vegetation originally present in the soil.

Correct Option: B

Humus refers to the decomposed and partly decomposed organic matter or animal and vegetation originally present in the soil.

Black soils, locally called regard or black cotton soils, and internationally known as 'tropical black earths' or 'tropical chernozems' have been developed by the weathering of the Deccan lava in India. They are highly retentive of moisture, extremely compact and tenacious when wet, considerably contracted developing deep wide cracks on drying and self ploughing and are credited with high fertility of crops like cotton.

Correct Option: A

Black soils, locally called regard or black cotton soils, and internationally known as 'tropical black earths' or 'tropical chernozems' have been developed by the weathering of the Deccan lava in India. They are highly retentive of moisture, extremely compact and tenacious when wet, considerably contracted developing deep wide cracks on drying and self ploughing and are credited with high fertility of crops like cotton.