Stone, Luis Fernando, and José Aloisio Alves Moreira. 1996. “Response of Upland Rice to Ploughing Depth, Potassium Fertilization, and Soil Water Status”. Pesquisa Agropecuaria Brasileira 31 (12):885-95. https://doi.org/10.1590/S1678-3921.pab1996.v31.4563.