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sbasak · 5th December 2005, 20:44

Tractors are used for ploughing the crops. Exhaust gases are toxic. They should not be passed over edible crops. That's may be the reason.

5th December 2005, 20:44	#10 (permalink)
sbasak BHPian Join Date: Nov 2005 Location: CCU-LTN Posts: 587	Tractors are used for ploughing the crops. Exhaust gases are toxic. They should not be passed over edible crops. That's may be the reason. __________________ Life is a math which you need to solve without knowing the answer!