The available form of nitrogen for plants is_________________?
The available form of nitrogen for plants is_________________?
A. NO3
B. NH4
C. Both a and b
D. non of these
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C. Moore (1973)
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Water courses are lined to avoid_________________?A. Transpiration
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B. 4th century AD
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One of the plant introduced from new world to the old world is_________________?A. Rice
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