Moderate
From the sources of plant nutrients availability in soil, which of the following statements are correct:
Correct answer: D. All of the above
- A. The plant absorbs carbon as carbondioxides directly from the atmosphere.
- B. Water is the source of hydrogen
- C. Air & water is the source of oxygen & the chief source of soil nitrogen is organic matter & when organic matter decomposes it gives ammonia.
- D. All of the above
Explanation
Plants obtain carbon mainly from atmospheric carbon dioxide, hydrogen from water, and oxygen from air and water. Soil organic matter is a major nitrogen source because decomposition releases ammonia and other usable nitrogen forms.
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