Department of Agricultural Engineering and Soil Science Agricultural Science Center, Federal University of Piauí Teresina, PI, Brazil.

Research Fellow of National Research and Technological Development, Brazil. Professor of Federal Agricultural University of Piaui, Agronomy Department. UFPI. Teresina, PI, Brazil. Dr. Araújo, has 15 years of research in various aspects of soil microbiology, he has edited two books and published over 50 refereed research publications, 10 invited book chapters and 55 presentations in international and national congress. Mentoring activities and educational experience (Theses (M.Sc.; Ph.D.)). Manuscript reviewer for international and national journals and funding agencies. Scientific Consultant of National Council of Science and Technology and others.