Humus

In soil science, humus (coined 1790–1800; < Latin: earth, groundWhitehead, D.C., Tinsley, J., 2006. "The biochemistry of humus formation". Journal of the Science of Food and Agriculture. Humus significantly improves the structure of soil and contributes to moisture and nutrient retention. humus is good nutrients to plants, it can help them to grow big and strong.