Pinheiro, S. L. G., Lanzer, E. A., & Nuernberg, N. J. (1993). Economic evaluation of liming and phosphate fertilization in alfalfa on the highlands of Santa Catarina State, Brazil. Pesquisa Agropecuaria Brasileira, 28(10), 1109–1119. https://doi.org/10.1590/S1678-3921.pab1993.v28.3976