Just built in the country, on what used to be a peanut field. Soil is very sandy. I've been moving LARGE plugs of St. Augustine into the yard and noticed that while decent green color when transplanting them, they are getting yellow tips on them shortly after. Never seen that before, but read up online, and it points to iron deficiency. So, I ran and got a 32 oz. bottle of chelated. 15-4-6% At the moment I only have a 2 gallon hand pump sprayer. My questions are: 1)that oz per 1000 square feet math confuses me. How many ounces per gallon is what I'd like to know? 2)How heavy should I apply it to the St. A areas? 3)Do I water it in, the same day? Just a drink or heavy sprinkling? The transplanted parts of the yard had a high nitrogen slow release fert. put down a couple months ago. Greened up quickly, then lost it. I have no idea what the PH is. 4)Any other advice is welcome also. Thanks.