Soil Science - Study Mode

[#236] Concept of Lime Potential comes from which law?
Correct Answer

(A) Schofield's Ratio Law

Explanation

Solution: 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.

[#237] What is Fanglomerate?
Correct Answer

(D) Cemented alluvial Fan

Explanation

Solution: Fanglomerates are poorly sorted, matrix-rich conglomerates that originated as debris flows on alluvial fans and likely contain the largest accumulations of gravel in the geologic record. In simple words, we can say, Fanglomerate is cemented alluvial Fan. whereas an alluvial Fan is a triangle-shaped deposit of gravel, sand and even smaller pieces of sediment. Such as silt.

[#238] For most minerals, the strength of cation adsorption, or lyotropic series, is
Correct Answer

(B) $${ ext{A}}{{ ext{l}}^{3 + }} > { ext{C}}{{ ext{a}}^{2 + }} > { ext{M}}{{ ext{g}}^{2 + }} > {{ ext{K}}^ + } = { ext{NH}}_4^ + > { ext{N}}{{ ext{a}}^ + }$$

Explanation

Solution: For most minerals, the strength of cation adsorption, or lyotropic series is $${x08f{A}}{{x08f{l}}^{{x08f{3 + }}}}{x08f{ > C}}{{x08f{a}}^{{x08f{2 + }}}}{x08f{ > M}}{{x08f{g}}^{{x08f{2 + }}}}{x08f{ > }}{{x08f{K}}^{x08f{ + }}}{x08f{ = NH}}_{x08f{4}}^{x08f{ + }}{x08f{ > N}}{{x08f{a}}^{x08f{ + }}}$$ The arrangement of anions and cations according to their ability to modify the properties of other solutes such as proteins is termed as Lyotropic series however Lyotropy refers to concentration-dependent physical effects in solutions and often more specifically to ion-specific behaviour in aqueous solution.

[#239] Weight of grain per bushel in corn is
Correct Answer

(B) 56 lb

Explanation

Solution: Bushel is one of the standards of weight created by USDA for each grain so that grain could be weighed to determine the number of bushels rather than trying to make volume measurements. And corn was assigned a bushel weight of 56 lb.

[#240] Effects of climate is totally nullified by parent materials in which soil order?
Correct Answer

(A) Entisol

Explanation

Solution: Effects of climate are nullified by parent materials in Entisol. Entisols are the soil order having soil of recent origin. These are the soils that do not show any profile development other than an A horizon. It has no diagnostic horizons and most are unaltered from their parent material. It occupies about 16% of the global ice-free land area.