How manure increases soil fertility
Kindly refer the link below for a similar query:
https://www.meritnation.com/ask-answer/question/why-fertilisers-and-manures-increase-soil-fertility/nutrition-in-plants/1220667
https://www.meritnation.com/ask-answer/question/why-fertilisers-and-manures-increase-soil-fertility/nutrition-in-plants/1220667