Soil Science - Study Mode

[#366] Sulphur content (%) in potassium sulphate is
Correct Answer

(A) 17%

Explanation

Solution: Potassium sulphate is an inorganic compound, water soluble solid, commonly used as fertilizer providing both potassium and Sulphur. It contains 17% of Sulphur approximately, which is required by plants for the growth process and also to adjust the pH level of the soil or hydroponic systems.

[#367] The alluvial soils of India, deficiency of the following nutrients is most wide spread :
Correct Answer

(B) Zinc

Explanation

Solution: In the alluvial soils of India, deficiency of zinc is most widespread. Analysis of soil and plant samples has indicated that 49% of soils in India are potentially deficient in Zn, Fe, Mn, Cu, B and Mo. Alluvial soils are formed by the deposition of the river load, it is fertile soil rich in minerals, especially lime.

[#368] CEC of montmorilonite is
Correct Answer

(C) 60 - 100 Cmol c (P + )/kg

Explanation

Solution: Montmorillonite is a very soft phyllosilicate group of minerals that form when they precipitate from water solution as microscopic crystals known as clay. CEC is the cation exchange capacity of any material. A higher CEC value usually indicates more clay and organic matter is present in the soil, high CEC soils generally have greater water holding capacity than low soils. CEC of montmorillonite is 60 - 100 Cmol c (P + )/kg.

[#369] Removal of Ca will be more in
Correct Answer

(A) Grasses & fodders

Explanation

Solution: Removal of Calcium will be more in Grasses & fodders.

[#370] The ratio of 'organic carbon' to 'organic matter' in soil is
Correct Answer

(A) 1.0 : 1.7

Explanation

Solution: Organic matter of the soil consists of three primary parts including small plant residues and small living soil organisms, decomposing organic matter and stable organic matter. Organic carbon is the measure of carbon content stored in the soil organic matter. The ratio of 'organic carbon' to 'organic matter' in soil is 1.0 : 1.7