Vale, D. wyllyam do, R. de M. Prado, J. da S. Santana, C. C. Avalhães, and I. M. Fonseca. “ZINC IN THE NUTRITION AND YIELD OF GRASS-MEGATHYRSUS CULTIVATED IN OXISOL DYSTROPHIC”. Scientia Agraria Paranaensis, vol. 11, no. 2, Nov. 2012, pp. 82-92, doi:10.18188/sap.v11i2.4739.