Soil Science MCQ Question and Answer | Agriculture MCQ Question

Sandy loam soil type has the lowest PWP.
PWP is a permanent wilting point or wilting point. It is defined as the minimum amount of water in the soil that the plant requires not to wilt. If the soil water content decreases to this or any lower point a plant wilts and can no longer recover its turgidity when placed in a saturated atmosphere for 12 hours.

The downward movement of water with salts within the soils is Leaching.
Leaching is the loss of water-soluble plant nutrients from the soil or applying a small amount of excess irrigation to avoid soil salinity. It happened due to the percolation of soil. percolation refers to sown ward movement of water within the soil.

Vermiculite is an altered or weathered product of mica. Here, interlayer K is replaced by Magnesium.
The weathering of micas to vermiculite is believed to occur by the replacement of potassium ions in the interlayer sites with hydrated exchangeable cations, primarily calcium and magnesium.
Vermiculite is mica, a hydrated, magnesium-iron-aluminum trioctahedral sheet silicate of varied composition.

SSP was the first commercial mineral fertilizer and it led to the development of the modern plant nutrient industry.
Single Super Phosphate (SSP) is a water-soluble fertilizer.
SSP is manufactured from rock phosphate. It is produced by reacting naturally occurring rock phosphate with sulphuric acid.

The enzyme responsible for the hydrolysis of starch is Amylase.
Amylase is an enzyme that hydrolysis alpha-bonds of large-linked polysaccharides such as starch and glycogen, yielding maltose and dextrin.
The complete hydrolysis of starch yields the sugar D-glucose, also known as Dextrose.

The concept of Lime potential comes from Schofield's Ratio Law. As per the law, the lime potential is a measure of the sum of the activities of calcium and magnesium hydroxides in the solution and is, therefore, a measure of the base status of the soil solution.
The lime potential is a simple function of the chemical potential of calcium hydroxide, lime. The mathematical expression of lime potential is pH - 0.5 pCa.