The proposed fertilization method is on the assumption that regular basal fertilization is still used as per the local plantation rubber growers practice.
NutriGrow Humic Acid and Carbon Based liquid fertilizer is highly concentrated and requires to be dilute before application. For drenching application , we recommend to sprinkle on a few spots around the canopy shade of the tree (distance would be about half the radius of the canopy shade). For the best result we recommend to use an injection tool to inject fertilizer directly into the soil ( about 10-15 cm. deep)