Soil Science - Study Mode

[#686] Nitrogen is applied in splits to
Correct Answer

(A) Increase its efficiencly

Explanation

Solution: Split application refers to utilizing a sequence of two or more nutrient applications, separated by approximately three weeks or more, to a single crop to improve nutrient uptake efficiency. Therefore Nitrogen is also applied in splits just to increase its efficiency.

[#687] Cation Exchange Reaction is an example of . . . . . . . . reaction.
Correct Answer

(C) Both A and B

Explanation

Solution: Ion exchange reaction is any class of chemical reaction between two substances, each consisting of positively and negatively charged species called ions that involves an exchange of one or more ionic components. Whereas cation exchange reaction involves the exchange of cations only. The cation exchange reaction is an example of a Reversible and Equivalence reaction . It is used to replace the existing ionic nanocrystalline structure with a different metal ion.

[#688] The hygroscopic water is retained in soil at
Correct Answer

(B) 31 bar

Explanation

Solution: Hygroscopic water is the water that is absorbed by moisture from the air. It forms an extremely thin tightly held film around the soil particles by surface forces. The hygroscopic water is not available for plants and it can be retained in the soil at 31 bar.

[#689] Which one should be recommended for potato?
Correct Answer

(B) Sulphate of Potash

Explanation

Solution: Sulphate of Potash is the one that is recommended for potatoes. sulphate of potash contains the most efficient balance of nutrients to optimize potato yields, quality and storability. Potash is an essential nutrient for all plants and has a major effect on the yield and quality of potatoes as well as the general health and vigour of the crop. It also helps in regulating the amount of water in the plant.

[#690] Match the following columns: Column I (Soils) Column II (State) a. Red soil 1. Rajasthan b. Black soil 2. Uttar Pradesh c. Laterite soil 3. Tamil Nadu d. Decan soil 4. Kerala e. Sandy soil 5. Maharashtra
Correct Answer

(C) a-5, b-4, c-3, d-2, e-1

Explanation

Solution: Red soil is mostly found in southeast Maharashtra. Red soil is red because of the presence of ferric oxide, it is porous and has a friable structure with a sandy to clay and loamy texture. Black soil is mostly found in the Kerala region. It is clayey in texture and is highly fertile. This soil is rich in calcium carbonate, magnesium, potash and lime but poor in nitrogen and phosphorus. Laterite soil is found in Tamil Nadu state in areas with high temperatures and heavy rainfall. This soil is formed by the process of intense leaching. Decan soil is the black or alluvial soil found in central India and regions of Uttar Pradesh, deposited by the surface water and is extremely fertile. Sandy soil is found in the desert region of Rajasthan. Sandy soil is light, warm, dry and tends to be acidic and low in nutrients.