Agronomy - Study Mode

[#1006] Which of the following cereal crop have highest area is India?
Correct Answer

(B) Rice

Explanation

Solution: Rice is the essential cereal crop that occupies the highest agricultural area under cultivation in our country. India had approximately 45 million hectares of land area. India is the world's second largest producer of rice, and the largest exporter of rice in the world, and rice is the first highly produced cereal in our country. Production has increased to 120 million tons in the financial year 2020 - 21.

[#1007] In stress condition, the osmotic potential in plants
Correct Answer

(B) Decrease

Explanation

Solution: Osmotic potential is the potential of water molecules to move from a hypotonic solution to a hypertonic solution across a semi-permeable membrane. In stress condition, the Osmotic Potential in Plants Decrease.

[#1008] Phosphate containing mineral is
Correct Answer

(B) Apatite

Explanation

Solution: Apatite is a phosphate-containing mineral, usually hydroxyapatite, fluorapatite, and chlorapatite. It is the association of the calcium ions that is responsible for the characteristic hexagonal crystal structure and morphology. The primary use of apatite is a source of phosphate in the manufacture of fertilizer and other industrial uses. It is occasionally used as a gemstone.

[#1009] True density of most mineral soils is usually
Correct Answer

(C) 2.65 g/cm 3

Explanation

Solution: True density is the quotient of mass over the volume of a sample, without considering pores in the material.
The true density of normal mineral soil is 2.65 grams per cubic centimeter. However, it can be as high as 3 g/cm 3 for very dense particles and as low as 0.9 g/cm 3 for organic particles.

[#1010] Green revolution has been most successful in
Correct Answer

(B) Wheat and rice

Explanation

Solution: The revolution brought in developing countries for farm land to enhance the production of food grains by incorporating high yield varieties of seeds and developed technology. The main crops were wheat and rice to be developed as these are the staple crop worldwide.