Samuels, G. et al. 1960. Influence of Height of Cane and Leaf Stage at Time of Sampling on Leaf-Nutrient Content of Sugarcane. The Journal of Agriculture of the University of Puerto Rico. 44, 1 (Jan. 1960), 11–15. DOI:https://doi.org/10.46429/jaupr.v44i1.12099.