Agronomy - Study Mode

[#881] Texture of the soil can be changed by
Correct Answer

(D) None of these

Explanation

Solution: Soil texture is an important soil characteristic that influences the overall productivity rate of crops. Soil texture is usually a complex size distribution represented by the relative proportions of the three particle-size fractions i.e. sand, silt and clay. Soil texture can be changed by adding other soil materials whether it's sand, silt, or clay. It cannot be changed and is affected by the use of fertilizer, pesticides and tillage practices.

[#882] Phyto-haemaglutanins generally known as
Correct Answer

(B) Lectins

Explanation

Solution: Phytohaemagglutinin is generally known as Lectins found in plants, especially certain legumes. It consists of two closely related proteins, called PHA-L and PHA-E, which cause blood cells to clump together. It is found in the highest quantities in uncooked red kidney beans and white kidney beans.

[#883] At what pH value, phosphate availability is the highest in the soil
Correct Answer

(B) 6.5

Explanation

Solution: Phosphate availability is highest in the soil at pH 6.5. soil available phosphorus is the fraction of total phosphorus in soil that is readily available for absorption by the roots of the plant. Approximately 30% - 65% of total soil phosphorus is in organic forms, which are not available to plants, while the remaining 35% - 70% is in inorganic forms.

[#884] Which states are the highest and lowest producers of potato crop?
Correct Answer

(A) Uttar Pradesh and Jharkhand

Explanation

Solution: Uttar Pradesh is the highest producer of potatoes in India, followed by West Bengal and Bihar. Uttar Pradesh shares 31.26% of the total production of potatoes in the country. Jharkhand is the lowest producer of potatoes accounting for 1.44% of the overall production of potatoes.

[#885] Phenylmercuric acetate (PMA) is a chemical used in agricultural crops in order to
Correct Answer

(C) Reduce transpiration

Explanation

Solution: PMA is Phenylmercuric acetate, it is a chemical used in crops to reduce transpiration. It is an antitranspirant when it is applied directly to the leaves of a plant, it reduces the amount of water lost through transpiration by closing the plant’s stomata.