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- Subject
- Soil Scienceagriculture-mcqs › soil-science
- Published
- 4 Nov 2020
- Last updated
- 28 May 2026
Explanation
Nitrogen is an essential element present in both nucleic acids and proteins, as it forms part of the amino groups and nitrogenous bases. Calcium and magnesium are not components of these biomolecules.
More Soil Science MCQs
Practice related questions from the same subject.
- 1.Which type of climate is most favorable for optimal crop growth and yield?
- 2.What term describes extensive regions of the Earth that share similar climate, soil, and communities of plants and animals?
- 3.What percentage of the Earth's fresh water is contained within lakes, reservoirs, and rivers?
- 4.What term describes the process of water moving downward through the layers of soil?
- 5.What is the term for the quantity of water that oven-dried soil at 105°C can absorb when placed in an environment with 100% relative humidity?
- 6.Which group of plants requires a significantly large quantity of water for their growth?
- 7.What components are found in both plant and animal residues?
- 8.From which country is the Journal of Plant and Soil published?