Which of the following increases/ increases nitrogen in the soil? 1. E – McqOptions

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1.	Which of the following increases/ increases nitrogen in the soil? 1. Excretion of urea by animals 2. Burning of coal by humans 3. Death of plants
A.	only 1
B.	2 and 3
C.	1 and 3
D.	1,2 and 3
Answer» E.

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