PREDICTING THE VARIABILITY OF COPPER AND ZINC IN LEAF AND SOIL OF OIL PALM PLANTED ON A 12 HA LAND USING GEOSPATIAL INFORMATION SYSTEM TECHNOLOGY. Jurnal Teknologi (Sciences & Engineering), [S. l.], v. 77, n. 24, 2015. DOI: 10.11113/jt.v77.6717. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/6717.. Acesso em: 16 apr. 2025.