This book is derived from original research article and the research is intended to solve problems of soil fertility in sorghum production especially in the semi-arid region of Africa. it can further be used for the intended purpose in many part of the world, particularly where sorghum production is practiced. the authors are academicians with strong enthusiasm in many areas of research particularly in agronomy and crop physiology. the results as revealed in this book, can be used to solve the current issues of low soil fertility in Africa and many part of the world.