Question

Mr Gupta grew wheat crop on his field continuously for 10 years he founded gradually the yield decreased why do you think this happened

Answer 1

He didn't practice crop rotation and so the soil become worst and worst year after year

Answer 2

Hello friend this is your answer....

Mr Gupta might not be knowing the correct method of yielding...
He didn't practice, crop rotation, mixed farming and row pattern method for yielding...

Hence he did not receive a good amount if yield even after 10 years..

Hope it helps you...