Soil Science - Study Mode

[#906] In India, which soil order have negligible area
Correct Answer

(D) Histosols

Explanation

Solution: In India, Histosols are the soil order that has a negligible area. Histosol is soil consisting primarily of organic materials. Organic soil material has an organic carbon content of 12 - 18% or more depending on the clay content of the soil. Histosols have very low bulk density and are poorly drained because the organic matter holds water very well. Histosols are also called Organosols.

[#907] Unconsolidated material overlying rocks is known as
Correct Answer

(B) Regolith

Explanation

Solution: Unconsolidated material overlying rocks is known as Regolith . Unconsolidated material is a sediment that is loosely arranged or unsatisfied, or whose particles are not cemented together, found either at the surface or depth. It is a layer of broken soil material that forms the surface of the land and covers the bedrock nearly everywhere. Regolith is inorganic and lies like a blanket over unfragmented rock.

[#908] Which of the following micronutrients mostly deficit in Indian soil?
Correct Answer

(A) Zn

Explanation

Solution: Zinc is the micronutrient that is usually a deficit in Indian soil. At present, about 48.1% of Indian soils are deficient in Diethylene-Triamine Pentaacetate (DTPA) extractable zinc. Zinc is an important component of various enzymes that are responsible for driving many metabolic reactions in all crops.

[#909] The major organic cementing agent in soil aggregate formation is
Correct Answer

(A) Lipids

Explanation

Solution: The major organic cementing agent in soil aggregate formation is lipid . Soil aggregates are clumps of soil particles that are held together by moist clay, organic matter (like roots), gums (From bacteria and fungi) and fungal hyphae. Soil aggregates form through the combined action of cohesion and fragmentation processes.

[#910] In Y-index 'B' denotes
Correct Answer

(C) Internal surface area