Soil Science - Study Mode

[#956] Nutrient index between 1.5 and 2.5 is categorized as
Correct Answer

(B) Medium

Explanation

Solution: Nutrient index (N. I.) is a measure of the nutrient supplying capacity of soils to plants. It makes it easy to compare soil fertility of different areas of soil as it obtains a single value for each nutrient. It is calculated as a low, medium and high ratings of soil nutrients. A nutrient index value below 1.5 is categorized as low. The nutrient index between 1.5 and 2.5 is categorized as Medium . A nutrient index value greater than 2.5, refers to a fertility status being high.

[#957] Which fertilizer/s is/are basic in nature?
Correct Answer

(C) NANO 3

Explanation

Solution: CAN is calcium ammonium nitrate also known as nitro-lime stone or nitrochalk, widely used as inorganic nitrogenous fertilizer. It is not basic. SSP is single super phosphate and is the most popular phosphatic fertilizer after DAP. It contains 3 major plant nutrients i.e. Phosphorus, Sulphur, and calcium. It is not basic. Sodium nitrate (NaNO 3 ) is also known as Chile saltpeter. It is a white deliquescent solid very soluble in water and is a readily available source of the nitrate anion. It is used in fertilizers, where it supplies the water-soluble form of nitrogen. It is basic but it does not alter the pH of the soil.

[#958] Little leaf is caused due to deficiency of
Correct Answer

(C) Zn

Explanation

Solution: Little leaf disease is caused by the deficiency of Zinc . Its deficiency leads to stunted growth and little leaf disease in crop plants like brinjal etc. Zinc is an important component of various that are responsible for driving many metabolic reactions in all crops. And if enzymes don’t work efficiently the whole growth and development will be hampered.

[#959] A soil having pH 6.0 is called
Correct Answer

(A) Acidic soil

Explanation

Solution: A soil having a pH of 6.0 is called Acidic soil. As the pH level below 7 is categorized as acidic soil whereas the pH of the soil above 7 - 14 is categorized as basic soil. The use of fertilizers, especially those supplying nitrogen usually causes acidity in the soil. And most plants thrive in slightly acidic soil because that pH affords them good access to all nutrients.

[#960] Aluminium in octahedral sheet of clay mineral indicates
Correct Answer

(A) Dioctahedral

Explanation

Solution: Aluminum is an octahedral sheet of clay mineral that indicates Dioctahedral . Octahedral sheets of clay are composed of individual octahedrons that share edges composed of oxygen of hydroxyl anion groups with Aluminium, Magnesium and Iron typically serving as the coordinating cations. An aluminum octahedral sheet of clay has six OH ions at each of the six corners of an octahedron, with the aluminum atom at the center of the octahedron.