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
Submitted by: Shafiq Rehman
Correct Answer: All of the above ✔
Last Updated: July 10, 2021