Unbelievable raise in production for a 5 years old Walnut tree with Arin Fertilizer

This Walnut tree that the farmer is pointing himself, is about 5 years old. As he says, this type of Walnut tree won’t give any products till it becomes about 8 to 10 years old but during these years it may have about 5 single walnut on the tree each year.
For the first year as we suggested, he used only from Arin Fertilizer for this tree and no other type of fertilizer. As the farmer counted himself, there’s like about 70 single walnut on the branches which is unacceptable for him.