What effect will the addition of animal waste and decayed plant matter have on the soil and land?

The addition of animal waste and decayed plant matter, also known as organic matter, enhances soil fertility by enriching it with essential nutrients and improving its structure. This organic matter increases the soil's water retention capacity, promotes microbial activity, and helps maintain soil pH levels. Additionally, it can enhance soil aeration and drainage, fostering a healthier ecosystem that supports plant growth and biodiversity. Overall, these amendments contribute to more sustainable land management and improved agricultural productivity.