Precision agriculture in oil palm plantations: diagnostic tools for sustainable N and K nutrient supplyBernard Dubos, Victor Baron, Xavier Bonneau, Olivier Dassou, Albert Flori, Reinout Impens, Jean Ollivier and Lénaïc PardonOCL, 26 (2019) 5DOI: https://doi.org/10.1051/ocl/2019001