Prof. Rafael Otto is a professor of Soil Fertility and Plant Nutrition at the Department of Soil Science, Luiz de Queiroz College of Agriculture, University of Sao Paulo (USP), Brazil. He obtained his Master’s and Ph.D. from Luiz de Queiroz College of Agriculture, USP, with a visiting period at the University of Illinois. He then received a post-doctoral degree from the Center for Nuclear and Energy in Agriculture. Prof. Rafael Otto’s research interests include the development of nitrogen fertilizers, with the addition of micronutrients and nanomaterials and nitrogen management for sugarcane production and the usage of nanomaterials for plant nutrition.