Soil Science - Study Mode
[#306] Fe is an important component of enzymes
Correct Answer
(D) All of these
Explanation
Solution: Fe is an important component of all the given enzymes that are nitrogenase, nitrate reductase, and nitrite reductase. All these are enzymes responsible for nitrogen fixation. Iron is an essential cofactor for a variety of redox reactions in plant metabolism and Fe requires enzymes to catalyze reactions that also involve oxygen, as a reagent or product of the reaction itself or as an entry or end point a metabolic pathway.
[#307] C : N ratio of FYM is
Correct Answer
(B) 40 : 1
Explanation
Solution: The C : N ratio of FYM is a ratio of the mass of carbon to the mass of nitrogen in a substance. The ratio of carbon and nitrogen in Farmyard Manure is 40 : 1. The carbon to nitrogen ratio is significant in composting because microorganisms need a good balance of carbon and nitrogen to remain active. A high C/N ratio can lead to prolonged composting duration and low C/N ratios enhance nitrogen loss.
[#308] Which element is considered as energy currency for the plant
Correct Answer
(A) P
Explanation
Solution: Phosphorus is one of the essential plant nutrients and is considered the energy currency of the plant. It is the main component of the ATP (Adenosine triphosphate) system, the "energy currency" of plants and animals. Phosphate is an important part of the components of DNA and RNA.
[#309] Basic slag is a
Correct Answer
(C) Double silicate and phosphate lime
Explanation
Solution: Basic slag is the alkaline slag formed by the product of steel-making processes. It is generally rich in lime and sometimes also in phosphates and can be used as fertilizer. Basic slag is a Double silicate and phosphate lime. It is used as a soil additive to render metals less soluble in contaminated soils by precipitation and adsorption on the surface of metal oxides.
[#310] Which one is called Black Mica?
Correct Answer
(C) Biotite
Explanation
Solution: Biotite is known as Black Mica. Biotite is a common group of phyllosilicate minerals within the mica group. It was regarded as a mineral species by the International Mineralogical Association until 1998. Biotite has a highly perfect basal cleavage and consists of flexible sheets or lamellae, which easily flake off.