Agronomy - Study Mode

[#286] Maximum area under wheat is in
Correct Answer

(D) China

Explanation

Solution: China is the top country in wheat production. About two-thirds of the total wheat production came from the North China plain. As per the reports, total wheat production in china was 1,34,250 thousand tons in 2020, which is 20.66% of the world's wheat production.

[#287] Which is the example of CAM plant
Correct Answer

(C) Pineapple

Explanation

Solution: CAM (Crassulacean acid metabolism), is a photosynthetic adaption to periodic water supply, in the plants occurring in Arid regions. Thus, the plants that grow in a dry environment, like cactus and pineapples show the CAM pathway to stay hydrated and minimize the photorespiration process in such plants. And that is why they are called CAM plants.

[#288] Which soil has the highest cation exchange capacity
Correct Answer

(D) Clay loam

Explanation

Solution: Clay in the loamy soil has the highest cation exchange capacity. It is highest in montmorillonite clay, which is present in chocolate soils and black alluvial soils. CEC is cation exchange capacity is the capacity to attract and hold cations because of its chemical structure.

[#289] Potato is a
Correct Answer

(A) Modified stem

Explanation

Solution: Potato is the stem tuber that belongs to the Solanaceae family. These are enlarged and modified stems or stolons that thicken to develop into storage organs of the plant. It stores the food of the plant i.e. starch also called starchy tubers.

[#290] Rice yield are higher during dry season mainly due to higher
Correct Answer

(D) Solar radiation

Explanation

Solution: Rice is the one of staple crops of our country, it belongs to the Kharif season crop. Rice growth and production are affected by the environment, soil properties, biotic conditions, and cultural practices. Environmental factors include rainfall and water, temperature, photoperiod, and solar radiation. Rice yields are higher during the dry season mainly due to higher solar radiation.