Samuels, G. and Alers-Alers, S. 1964. Effect of Time of Nitrogen Application on the Sucrose Content of Sugarcane Ratoons. The Journal of Agriculture of the University of Puerto Rico. 48, 4 (Oct. 1964), 304–307. DOI:https://doi.org/10.46429/jaupr.v48i4.12998.