Lavres Júnior, J. ., F. A. . Monteiro, and P. F. . Schiavuzzo. “Sulphur Concentration, SPAD Value and Yield of Marandu Grass As Related to Sulphur Supply”. Brazilian Journal of Agricultural Sciences, vol. 3, no. 3, Apr. 2022, pp. 225-31, doi:10.5039/agraria.v3i3a278.