This course discusses the nutrient elements needed by plants to support optimal plant growth, including their classification, absorption mechanisms carried out by plants both through roots and leaves and the involvement of these elements in vital processes such as photosynthesis, Nitrogen metabolism. , and other processes related to the assimilation of nutrients. This includes discussing the consequences of nutrient deficiencies and excesses for plants as well as how to practically diagnose these nutrient deficiencies and excesses. Studies on plant symbiosis with other microorganisms related to nutrient availability are also subject to study, for example with Rhizobium, Mycorrhiza, phosphate solubilizing bacteria and other microorganisms. The decomposition process that occurs in the soil is related to the availability of nutrients and allelochemical compounds in the soil as a result of this process is also included in this study material. In this course, methods regarding the rhizosphere are also studied, for example in relation to marginal land, rhizosphere gradients and the nutrients contained in each rhizosphere gradient. This course is presented in the form of theory and practice to facilitate various process skills (minds on activity and hands on activity) which will be used to solve problems in the field of plant nutrition and its application to support the growth of the spirit of ecopreneurship, research and quality control related to nutrient science. Learning is packaged with a student-certified learning approach using various methods according to the characteristics of the material, for example presentations, discussions, and practicums or other learning strategies.