I am going to be spraying 28 on my hay using teejet sj7 streamjet nozzles. I want to apply around 50lbs per acre of nitrogen with would equate to 5 gallons. I was going to use a ratio of 5 gallons of 28 with 15 gallon of water and spray at a rate of 20 gallons per acre. But I have heard some people just apply straight 28 without diluting it so then that would be just a rate of 5 gallons per acre. Which is better? I figure that the water will help it absorb into the soil better.