Sampaio, E. V., Salcedo, I. H., & Bettany, J. (2014). Nutrient cycling in sugarcane. I. Plant recovery of N from single or split urea (15N) application. Pesquisa Agropecuaria Brasileira, 19(8), 943–949. https://doi.org/10.1590/S1678-3921.pab1984.v19.15991