When it comes to the study of agriculture, you must understand that the soil has quite a bit to do with the way that food grows, the types of foods that will grow in the soil, and if the soil has the correct essentials to grow quality crops.
For those that want a profession in this field of agriculture will learn various subjects such as chemical, biological, and physical properties of soil via analyzing and then use the knowledge to aid with issues like protecting the health of humans, ensuring the sustainability of the environment, and increasing the production of crops.
This study is, of course, the study of soil that is one of our natural resources on the surface which does include other topics such as fertility properties, biological, chemical, physical, mapping, classification, and formation and how these properties are related to the management and use of the various soils.
There are different branches of soil sciences which include pedology and edaphology. Pedology includes classification, morphology, chemistry, and formation of the soil while edaphology is mainly the study of the influence the soil has on various organisms mainly plants. There are many different professions that work with the advancement of soil sciences including sanitarians, sylviculturists, archaeologists, biologists, microbiologists, physical geographers, ecologists, chemists, geologists, engineers, and agronomists.
In order to understand a bit more about the two main studies of soil science, you must realize that pedology is the study of the soil in its own natural setting while edaphology is the study of the soil with its relationship to the uses for the dependency of the soils. Both of these studies use various subjects including soil biology, soil chemistry, and soil physics.
You must also remember that research and mapping are also a huge factor when it comes to soil science, as our world is ever changing including such topics as greenhouse gases, as well as determining the type of soil for which to cover a landscape or plant a specific crop.