Soil Science - Study Mode

[#451] Which type of oil cakes are having higher C : N?
Correct Answer

(A) Edible oilcakes

Explanation

Solution: C : N ratio is a ratio of the mass of carbon to the mass of nitrogen in a substance. The C : N ratio is observed to be higher in Edible oil cakes like Soybean Cake, Rapeseed cake, Cottonseed cake, groundnut cake, sunflower cake, copra cake and linseed cake, etc.

[#452] The basic slag is
Correct Answer

(B) Citrate soluble fertilisers

Explanation

Solution: Basic slag is a byproduct of the steel industry low in silica and high in base-forming oxides that are used in the basic process of steelmaking and that is subsequently useful as a fertilizer. It is mostly citrate soluble fertilizers, quicklime and magnesite introduced for refractory protection, neutralizing the alumina and silica separated from the metal.

[#453] Endopedon having high bulk density is
Correct Answer

(A) Fragipan

Explanation

Solution: Endopedon is a diagnostic horizon characterized by the accumulation of aluminum and organic matter with or without iron. And the endepedon with high bulk density is known as Fragipan. A Fragipan is a diagnostic horizon in USDA soil taxonomy. They are altered subsurface soil layers that restrict water flow and root penetration.

[#454] Amorphous hydrous titanium oxide is
Correct Answer

(C) Leucoxene

Explanation

Solution: Leucoxene is amorphous hydrous titanium oxide. It is a fine granular alteration product of titanium minerals, a mineral consisting of rutile and partly of anatase or sphene occurring in some igneous rocks and iron ore deposits. It varies in colour from yellow to brown.

[#455] Anaerobic N-fixing bacteria
Correct Answer

(A) Clostridium

Explanation

Solution: Nitrogen-fixing bacteria are prokaryotic microorganisms that are capable of transforming nitrogen gas from the atmosphere into fixed nitrogen compounds that can be easily available for plants for absorption like ammonia. Bacteria can be anaerobic like Clostridium and aerobic like Azatobacter. Clostridium is a non-symbiotic, anaerobic nitrogen fixing bacteria that fix nitrogen in the absence of oxygen.