what is harrow?how it is usefull
Kindly refer both the link provided below for your query:
https://www.meritnation.com/ask-answer/question/what-is-a-harrow/science/2370906
https://www.meritnation.com/ask-answer/question/harrow-is-used-for/crop-production-and-management/2275945
https://www.meritnation.com/ask-answer/question/what-is-a-harrow/science/2370906
https://www.meritnation.com/ask-answer/question/harrow-is-used-for/crop-production-and-management/2275945