Soil Science - Study Mode

[#326] Argillic subsurface horizon is common diagnostic feature of
Correct Answer

(B) Ultisol

Explanation

Solution: Argillic subsurface horizon is a common diagnostic feature of Ultisols . Argillic subsoil horizon is identified by the illuvial accumulation of silicate clays. Ultisols are commonly known as Red clay soils. It is formed by the continuous weathering of minerals in a humid, temperate climate without new soil formation.

[#327] Deforestation has an alarming affect on
Correct Answer

(B) Soil erosion

Explanation

Solution: Deforestation is the phenomenon of the removal of forests i.e. trees. Removal of trees causes global warming, a temperature rise, and ultimately natural calamities like floods and droughts. The flood causes the wash off of the top fertile layer of soil from the agricultural field which is called soil erosion, which makes the soil unfertile and lacks nutrients. Thus, deforestation has an alarming effect on soil erosion which makes the soil unfertile.

[#328] The Central Fertiliser Quality Control Institute is located at
Correct Answer

(D) Faridabad

Explanation

Solution: The Central Fertilizer Quality Control Institute is located in Faridabad, Haryana. The institute functions under the administrative control of the INM Division of the Union Ministry of Agriculture & Farmers Welfare, Department of Agriculture and Farmers welfare as a sub-ordinate office under the administrative control of the joint Secretary. The main objective of this institute is inspection and analysis of both indigenous and imported fertilizers, also standardization and development of methods of analysis of fertilizers.

[#329] Dolomite rich in
Correct Answer

(B) Mg

Explanation

Solution: Dolomite rock is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite CaMg(CO 3 ) 2 . Dolomite is resistant to erosion and can contain bedded layers or be unbedded. In natural dolomite, magnesium is prominently present between 44 - 50 percent along with calcium, indicating some substitution of calcium into magnesium layers.

[#330] During Podzolization which are accumulated in Bhorizon?
Correct Answer

(D) All of the above

Explanation

Solution: Podolization is a complex soil formation process by which dissolved organic matter and ions of iron and aluminiun, released through weathering of various minerals, form organo-mineral complexes and are moved from the upper part of the soil profile and deposit in the deeper parts of the soil. During Podolization, R 2 O 3 , CaCO 3 and Humus are accumulated in the B horizon. This generally occurs in areas where precipitation is greater than evapotranspiration.