This book covers basic and advance soil courses. Contents in this book are designed according to the soil science syllabus prescribed by ICAR. These chapters of book mainly discuss the basic idea of soil nutrition; Role of nutrients in plants and the factors affecting the availability of nutrients, soil fertility evaluation, soil test based fertilizer recommendations including modern techniques of soil fertility like STCR equations, DRIS, Leaf colour chart (LCC), Green seeker, Remote sensing techniques ,GIS, SSNM and Nanofertilizers.