Introducing Bio-organic fertilizer in palm tree

I have heard a lot about apply organic fertilizer once a year to enrich the microorganism in the soil after long period of applying chemical fertilizer. 

The reason for stop me introduce in mine farm was the cost per bag. A normal branded 12-12-17 + 2MgO was cost RM124 (50Kg) per bags, whereas the branded bio-organic fertilizer were RM170 to RM190 per bags. 

Recently someone introduce me to Riches Harvest Bio-Organic fertilizer that made of natural resources and the cost is relatively reasonable. the content of this bio-organic fertilizer as follows:-

• Palm Kernel shell powder
• Palm Kernel cake
• Palm press fiber
• Effluent sludge
• Microorganism
• Enzyme
• Natural Mineral Contents
• Humid Acid
• coffee grounds

It is recommended to apply 5kg per tree. Instead I apply 1kg per 10 feet distance. Refer to the video below.

It was fortunate, after applying bio-organic fertilizer, heavy rain came. Unexpectedly, the bio-organic fertilizer does not wash away or dissolved.