Agronomists study SOIL, which is a natural resource composed of organic matter, minerals, gases, liquids, and organisms that together support life on Earth. SOIL is essential for growing food, making it an important field of study for agronomists. Agronomists study the physical, chemical, and biological properties of SOIL, as well as how to manage and improve SOIL quality. They also research how to use SOIL to grow crops, protect the environment, and reduce erosion.