Economical and environmental problems due to overuse of chemical fertilizers and intensification of agriculture, especially applying agricultural modern technologies such as chemical fertilizers and pesticides use has led to water pollution, increase diversity of diseases, loss genetic diversity, and decrease soil quality. The most important and most practical researches focus on studying about biofertilizers effects on various crops and also production of these fertilizers. Biofertizers application, especially in intensive agriculture and nutrient poor soils is an inevitable necessity. Today, biologic fertilizers are an important alternative for chemical fertilizers to increase soil fertility, crops quality and quantity in sustainable agricultures. Corn as one of the most important crops in the world needs to be studied more and require special attention in order to increase crop production and nutritional quality. Studying about biological and mineral fertilizers to achieving this purpose is imperative. This book is especially important to those who are willing to conduct research activity in the field of crop science, students, academicians and development professionals.