“USE OF CHLOROPHYLL METER SPAD-502 IN THE MANAGEMENT OF NITROGEN CORN FERTILIZATION. AZUERO, PANAMA. 2000-2002”., ciencia-agropecuaria, no. 17, pp. 1–16, Oct. 2004, Accessed: Oct. 09, 2026. Available: https://idiap.desarrollo-ojs1.metadatos.org/index.php/ciencia-agropecuaria/article/view/322