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Samuels, G., Landrau, Jr., P. and Capó, B.G. 1956. Influence of Fertility Levels on the Varietal Response of Sugarcane. The Journal of Agriculture of the University of Puerto Rico. 40, 3 (Jul. 1956), 129–143. DOI:https://doi.org/10.46429/jaupr.v40i3.13794.