Continuing the international tradition of Advances in Agronomy, Volume 48 highlights crop and soil science including hybrid improvement in tropical maize, pearl millet as food, feed and forage, cotton host plant resistance to insects, and electrochemical techniques applied to soils. This volume should be of interest to researchers and students in agronomy.Key Features* Maize, pearl millet, and cotton crops* Reactions and availability of nickel in soils* Electrochemical techniques for soil analysis