RE: Poast dilution?
yes, it can be diluted too much. this is what happens...not enough active ingredients are in your solution to achieve the desired effect (like non alcoholic beer, it' s something like 0.5%). or, you have to apply so much of the solution that the majority of it runs off the vegetation and onto the ground.
if i was you, i would fill the sprayer with just 4 gallons of water and see how much of an area you can spray to totally cover the blades with droplets without having any of it run off. it may be 1/5, 1/4, 1/3, 1/2, 2/3, or 3/4 of an acre. once you know how much you can cover with the 4 gallons, you will know what percentage of the pint to apply to the 4 gallons. example: 4 gallons of water covers 1/3 of an acre. use 1/3 of a pint in your mix. spray the solution, repeat for the next 1/3, and repeat for the final 1/3.
it' s cheaper to spray water to get your system calibrated than it is to spray the poast on a trial and error, wait and see basis.