Also.... If you are anywhere near me... Cutting down the trees could escalate your problems... That hot subtropical sun... at my house in the Sandhills... My cukes are being sun scalded... Some years, it's the tomatoes being sun scalded...
I don't know how to use the product you have either... But when I'm trying to improve the soil, I bring in organic amendments, and let the acidity of the soil and trace mineral issues resolve themselves.
Personally.... I know where all the horses are boarded in my area... And.... I pull up with my pick-em-up-truck.... And haul away all the poop I can carry. Really important to get a LOT of organic material into that dry sand.
