Thanks for your response, Jerel. I am planning on doing a similar thing, and applying sap analysis on most profitable or struggling crops. Starting with tomatoes this year. I get kind of envious of the growers who have just one or two crops, as they get to really focus in on perfecting their systems for that crop! I’d just really like to get a grip on nitrogen management, I believe it is very important to get right. (or as right as I can!)