The foliar diagnosis system develped by PORIM is fairly universal for making fertilizers recommendations for mature oil palm based on leaf nutrient data. The system aims to provide fertilizer adjustment recommendations based on the results of leaf analysis of frond 17. It is emphasised that initial fertilizer recommendations should be made on environmental data which requires soil climatic, and palm data input. The purpose of PORIM’s foliar diagnosis system is to correct an existing recommendations which may not be accurate due to unforeseen or unexpected factors.

Main Researcher: Zin Z. Zakaria