Issue link: http://read.uberflip.com/i/590055
Field Trial Findings The Potash Your Potatoes Demand Why Growers Prefer SOP over MOP When it comes to choosing between muriate of potash (MOP) and sulfate of potash (SOP) as a potassium source for potatoes, SOP is the clear winner – resulting in bigger yields and higher- quality crops. A Washington field trial compared common K sources and found that potatoes fertilized with Protassium+® premium sulfate of potash from Compass Minerals®, yielded over five tons of potatoes more per acre compared with the MOP treatments. The study, near Othello, Washington, was led by Steve Holland, a research and agronomic consultant with Holland Agricultural Services. The trial utilized Umatilla Russet potatoes, ranging from two to two and a half ounces in size, planted on 10-feet-by- 30-feet plots with four replications within a commercial field. The trial's five treatments consisted of: Protassium+, MOP, MOP plus sulfur, a Protassium+/MOP blend and an untreated control. Across all four replications, the Protassium+ plot significantly outperformed the other treatments. Not only did the Protassium+ treated potatoes produce five tons more than the MOP fertilized potatoes (and more than three tons of U.S. No. 1s), but they also showed momentous vigor in the early growth stages. Paid Advertisement Total Yield Tons Per Acre 25 30 35 20 0 25 30 35 20 0 Tons Per Acre Total U.S. #1s Protassium+ MOP MOP + S Protassium+ + MOP Untreated Protassium+ MOP MOP + S Protassium+ + MOP Untreated Total Yield Tons Per Acre 25 30 35 20 0 25 30 35 20 0 Tons Per Acre Total U.S. #1s Protassium+ MOP MOP + S Protassium+ + MOP Untreated Protassium+ MOP MOP + S Protassium+ + MOP Untreated