Soil Science - Study Mode

[#371] Chlorophyll absorption band is located within
Correct Answer

(A) 0.45 - 0.67 μ

Explanation

Solution: Chlorophyll is the pigment present in the leaf of the plant to absorb sunlight, and the chlorophyll absorption band refers to the absorption spectrum of chlorophylls including wavelengths of blue and orange-red light, as indicated by their peaks around 450 - 475 nm and around 650 - 675 nm. The chlorophyll absorption band is located within 0.45 - 0.67 μ.

[#372] The term 'Alto' is used to signify . . . . . . . . type of cloud.
Correct Answer

(B) Medium

Explanation

Solution: The term 'Alto' is used to signify a Medium type of cloud. There are different types of clouds: High clouds (16,500 - 45,000 feet) Cirrus - these clouds are delicate and feathery that are made mostly of ice crystals. Mid-level clouds (6,500 - 23,000 feet) Altocumulus - these are small patches of clouds, called cloudlets, which most commonly exist in the shape of rounded clumps. Low Clouds (Less than 6,500 feet) Cumulus Special clouds (Contrails)

[#373] Potash Research Institute is situated at
Correct Answer

(A) Gurgaon

Explanation

Solution: Potash research institute is situated in Gurgaon, (Haryana). Mr. Surinder Bansal is the Director of the Potash Research Institute of India. It imports, handles, promotes and markets potash-based fertilizers in our country. Its main motive is to make the efficient use of potash fertilizer to enhance the yield of crops.

[#374] Among the following, the sequence of textural classes of soil with increasing order of fineness of texture is
Correct Answer

(D) LS, SL, L, SCL, CL

Explanation

Solution: Among the following, the sequence of textural classes of soil with increasing order of fineness of texture is LS, SL, L, SCL and CL. Whereas, LSC refers to loamy, sandy, and clay respectively. That means clay loamy soil is the finest of all whereas loamy sandy soil is not that fine because of the presence of sand particles in it. Soil texture is a classification instrument used to determine soil classes based on their physical texture.

[#375] Reduction of pore volume by expulsion of water is termed as
Correct Answer

(B) Consolidation

Explanation

Solution: The reduction of pore volume by the expulsion of water is termed Consolidation. The term consolidation refers to the process by which a soil mass decreases in volume in response to either natural or man-made loadings. The compression of saturated soil under steady static pressure lead to a reduction in the pore size and volume of the soil.