[Solved] Which is true about soil fumigants..?

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Q.	Which is true about soil fumigants..?
A.	On a small scale the chemical is often applied to the soil which is then covered with polythene sheets for a specified time.
B.	On a small scale the chemical is often applied to the soil which is then covered with polythene sheets for a non-specified time
C.	On a large scale the soil surface may not be packed following the treatment.
D.	The chemicals are applied a few days before planting.
Answer» A. On a small scale the chemical is often applied to the soil which is then covered with polythene sheets for a specified time.

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