1. Fertilizer science.
A large group, is a chemical that contains elements of principles of plants; Nitrogen (N), phosphorus (P) and potassium (K) when use to communicate with each other. A long time will cause acidic soil. The high acidity is inappropriate. The plant also may have other factors involved is farming. The wrong way makes the earth was born to worsen. Or may be caused by nature. The destroyer of soil resources.