7th Edition of
Plant Nutrition itself shows absorption of inorganic nutrients and water through their root system and carbondioxide from the environment. Plants require macronutrients like carbon, nitrogen, oxygen, hydrogen, potassium, phosphorus, calcium, sulfur and magnesium.
For Plant Nutrition, plants absorb organic compounds along with water; sunlight and carbon dioxide produce the energy which is useful to plant growth. Such type of plants is called autotrophs where they form their own food. Another type is heterotrophs where they form their food be depending on the parasite as they lack chlorophyll.
Soil Science deals with study of soil i.e. surface of the earth which includes soil formation, classification and mapping, fertility properties, physical, chemical and biological properties of soil and study on these properties are important in soil management.