Soil fertility is crucial in achieving sustainable agricultural productivity and ensuring healthy crop growth. It refers to the soil\'s ability to provide essential nutrients in adequate amounts to support plant development. Maintaining soil fertility requires a balanced approach that combines natural processes with effective fertilization practices. A practical guide to fertilization begins with soil testing to determine nutrient deficiencies and pH levels. Based on the results, farmers can select the appropriate type and quantity of fertilizers, whether organic or inorganic, to meet crop needs. This practical guide consists of an introduction and determination of fertilizer dosage, liming and determination of lime dosage, corn as plant indicator, use of leaf color chart, use of rice field soil testing equipment, and plant tissue analysis.

Agrogeology and soil mineralogy courses can help students understand various natural phenomena in our environment, especially rocks, minerals, geological structures in the scope of agriculture, both positive and negative. This understanding can help students provide recommendations for improvements, both temporary and sustainable.

A practical guide to soil mineralogy involves understanding, identifying, and analyzing the mineral composition of soils to assess their properties and applications. Soil mineralogy is essential in agriculture, engineering, environmental science, and land management. This guide provides an overview of the key concepts, methods, and tools for soil mineralogy analysis.