Comparison of Polymer-coated Urea Fertilizers

Materials and Methods The study was conducted at the Iowa State University Horticulture Research Station on a Nicollet soil with 5 ppm P, 112 ppm K, a pH of 7.05 and an organic matter content of 4.1 percent. Polyon 44.5-0-0 and XCU 43-0-0 were applied at 1 and 2 lb N/1,000 ft to ‘Unique’ Kentucky bluegrass turf. Data collection began when first fertilizer response was observed on October 3 and continued through November 21. Data were visual evaluations of turf response to fertilizer based on quality, color, and uniformity of the individual plots, with 9 as the highest response and 1 as the lowest, with a rating of 6 required for acceptable.