Steven from Plympton, Ma writes
It's calibration is 20 gal per acre.
TurfgrassPro 28 - 0 - 0 rates vary depending on the type of turfgrass per the product label. Use higher rates in high sodium soils and / or prior to expected heat stress. Please remember the amount of water used is not critical, but should be sufficient for uniform coverage of the target area. Calibrate by determining the volume of water required to treat 1,000 square feet.
Cool Season Turf: 4-9 oz. per 1000 ft. sq.
Warm Season Turf: 6-12 oz. per 1000 ft. sq.
Answer last updated on: 05/24/2018