When it comes to fertilization, everyone has questions like what fertilizer to apply, how to apply, and when to apply? However, it is not easy to answer these questions accurately. Just as medical doctors could not diagnose a patient merely based on apparent symptoms, they have to conduct comprehensive observations and testings coupled with analysis of essential details in order to come up with an effective treatment plan. The same applies to crops, it must go through diagnostic process, namely “three diagnosis” method, history taking, site assessment and physical examination, taking into account other factors such as weather, soil, plant growth stage etc. to offer effective and efficient fertilization. Malaysia is the second largest oil palm producer in the world. Some farmers inaccurately applied their years of oil palm plantation…