Dial-a-Rate Flow Calculator « Go Back Row Spacing – Inches* Update Speed – MPH* Update Application Rate – GPA Update Flow Per Tip, GPM Solution Density* Approximate Densities of Common Fertilizers Water: 8.34 lbs/gal 28-0-0: 10.65 lbs/gal 32-0-0: 11.05 lbs/gal 10-34-0: 11.65 lbs/gal Update Position Pressure (see note below) 1 psi 2 psi 3 psi 4 psi 5 psi 6 psi 7 psi 8 psi Flow Per Tip – Onces Per Min Flow Per Tip – Onces Per 100 Feet