Priebe, H. A.; Oliveira, R. R. A.; Luz, A. R.; Dornelles, E. S.; Bezerra, G. A. da S.; Dutra, D. V.; Maran, V.; Ferreira, P. A. A. Modeling for Liming and Fertilization Recommendation for the Main Grain Producing Regions of Brazil in the SQL Language. CeN 2019, 40, 131-139.