Soil Science - Study Mode

[#346] A mature and dry plant tissue contain about proteins (%)
Correct Answer

(B) 1 - 15

Explanation

Solution: A mature and dry plant tissue contains about 1 - 15% proteins. The plants provide protein containing all the essential amino acids in percentages meeting FAO standards. The key ingredients plants need for protein production are glucose and nitrates, which are taken up from the soil by the roots.

[#347] Redox potential for nitrification should be
Correct Answer

(A) > + 250 mV

Explanation

Solution: Redox potential is a measure of the ease with which a molecule will accept electrons, which means that the more positive the redox potential, the more readily a molecule is reduced. The redox potential is stimulated by the variation of a specific biological nitrification or denitrification process. The value of redox potential for nitrification should be > + 250 mV.

[#348] Among these which one is Chromium containing mineral?
Correct Answer

(C) Garnet

Explanation

Solution: Among the given options, Garnet is the chromium-containing mineral. It is a member of a group of common silicate minerals that have similar crystal structures and chemical compositions. It may be colorless, black and many shades of red and green. Garnet comprises a group of silicates with may contain calcium, iron, magnesium, manganese, aluminum, chromium and many more elements in traces.

[#349] Fertility gradient approach was given by
Correct Answer

(B) B. Ramamoorthy

Explanation

Solution: Soil fertility gradient (SFG) is the spatial pattern of variability in soil. Fertility gradients were created by applying graded doses of fertilizer N, P and K on the strips. The experiment on the Fertility gradient was proposed and conducted by B. Ramamoorthy in 1967.

[#350] How much quantity of total incoming solar radiation is absorbed by the soil and can be used to warm it
Correct Answer

(A) 10%

Explanation

Solution: Approximately 10% of the total incoming solar radiation is absorbed by the soil and can be used to warm it. Whereas about 70% of the total incoming solar energy is absorbed by the Earth system or we can say our environment and the remaining 30% is reflected in space.