Rosolem, Ciro Antonio, José Ricardo Machado, and Oswaldo Brinholi. 2014. “Effects of Nitrogen, Phosphorus and Potassium Fertilization on Sweet Sorghum Grown on a Dusky Latosol”. Pesquisa Agropecuaria Brasileira 20 (6):635-41. https://doi.org/10.1590/S1678-3921.pab1985.v20.15701.