Soil Science MCQ Question and Answer | Agriculture MCQ Question

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.

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.

Removal of Calcium will be more in Grasses & fodders.

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

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.

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)

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.

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.

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.

It pH of the soil increases, then
CEC, Cation exchange capacity which is a useful indicator of soil fertility increases with an increase in the pH of the soil.
AEC (Anion exchange capacity) represents the positive charge available to attract anions in soil and is not pH-dependent, as constant-charge soil particles carry no significant positive charge.