Soil Science - Study Mode

[#726] Father of Soil Testing is
Correct Answer

(C) Truog

Explanation

Solution: A soil test commonly refers to the analysis of a soil sample to determine nutrient content, composition, and other characteristics such as acidity or pH level. It is done to estimate the plant-available concentrations of plant nutrients and to determine fertilizer recommendations. Emil Truog is the father of soil testing.

[#727] Concentration of which element is highest in soil
Correct Answer

(B) O 2

Explanation

Solution: Out of the given options concentration of Oxygen, the element is highest in soil. Soil is porous and the pores of the soil are filled with air in the cavities. And it is well-known oxygen is the second most abundant element after nitrogen in the air, thus the concentration of oxygen is more than iron, Copper and Zinc.

[#728] Which element(s) is/are mobile with plant system?
Correct Answer

(D) All of the above

Explanation

Solution: All the given elements Chlorine, Molybdenum and Potassium are mobile with the plant system. The upward movement of calcium takes place in the transportation stream through the xylem. The calcium ions do not move by mass flow but by a series of exchange reactions along negatively charged sites on the wall of the xylem vessels. They move from one place to another when there is any deficiency detected in plants. Plant moves mobile nutrients from older issues to newer tissues.

[#729] The N in all fertilisers comes from
Correct Answer

(C) Air

Explanation

Solution: The nitrogen in all fertilizers comes from the air . Nitrogen is also a component of the chlorophyll molecule, which enables the plant to capture sunlight energy by photosynthesis, driving plant growth and grain yield. Nitrogen plays a critical role within the plant to ensure energy is available when and where the plant needs it to optimize yield.

[#730] Soil fertility and fertilizers' was written by
Correct Answer

(B) Tisdale et al.

Explanation

Solution: Soil fertility and fertilizers were written by Tisdale et al . This is an introduction to nutrient management and provides a thorough understanding of the biological, chemical and physical properties affecting soil fertility and plant nutrition. Covering all aspects of nutrient management for profitable crop production, the text pays particular attention to minimizing the environmental impact of soil and fertilizer management.