Morillo et al., 1997. Comm. Soil Sci. Plant Anal., 28 (9-10): 833-840

Morillo, D. E.; Faria Marmol, J.; Caraballo, A.; McDowell, L. R., 1997. Frequency of defoliation and nitrogen and phosphorus fertilization on Andropogon gayanus Kunth. 2 Macroelement concentrations. Comm. Soil Sci. Plant Anal., 28 (9-10): 833-840