Plant nutrition is the study of the chemical elements and compounds necessary for plant growth, plant metabolism and their external supply. Plants use inorganic minerals for nutrition. Complex interactions involving decomposition of rocks, organic matter, animals and microbes take place to form inorganic nutrient ions in soil water. Roots absorb these mineral ions if they are readily available. They can be tied up by other elements or by alkaline or acidic soils. Soil microbes also assist in ion uptake. There are 14 essential plant nutrients. Carbon and oxygen are absorbed from the air, while other nutrients including water are typically obtained from the soil.

The module covers ion uptake and transport in plants, mineral nutrition and yield response of plants, function of macronutrients and micronutrients, beneficial of mineral elements, relationship between mineral nutrition and plant diseases, and symptom of deficiency and toxic of mineral nutrients in plants.