Dollar spot and ferrous sulfate heptahydrate
May 9, 2019
A recent article reporting positive dollar spot control results using ferrous sulfate left out a couple of key details — for example, the rate of the ferrous sulfate and exact product used. University of Wisconsin professor Dr. Paul Koch (@uwpaul on Twitter) clarified the product used and application rate. The research used JR Simplot's Extreme Green 20 (20% Fe, 12% S) at a rate of 6 oz ferrous sulfate/1000 sq ft applied in 1.5 gal/1000 sq ft on a seven-day…