soil science 
noun [mass noun]
The branch of science concerned with the formation, nature, ecology, and classification of soil.‘I really looked forward to finding solutions to reverse this erosion,’ says Jezile, who is now studying soil science and ecology on rangelands....
- Data from organic farming, appropriate technology, agroforestry, soil science, aquaculture, and a dozen other disciplines all support the techniques organized by permaculture.
- We've made huge advances in agricultural mechanization, in fertilization, in soil science.