Learn how a variety of our controlled-release and slow-release fertilizers provide nutrients to turfgrass over time.
The below graph denotes typical nutrient release for 100% DURATION CR 180 fertilizer technology. The solid blue line indicates nutrient release as a percentage of the total amount and corresponds to the left-side axis. The shaded area represents corresponding release in lbs nitrogen (N) per 1000 ft2, based on application at a recommended rate of 2.3-3.1 lb N/1000 ft2, and is related to the right-side axis.
Test Method: Refractive index variation with dissolved fertilizer salt concentration is used to measure the percent release measurements up to 80% release.
Release curve is generated by placing a measured weight of DURATION CR 180 fertilizer into a known volume of water. Water is maintained at a constant temperature and the release of nutrient into the water is measured every seven days. Data is plotted to create the typical release curve.
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The below graph denotes typical nutrient release for 100% XCU fertilizer technology. The solid blue line indicates nutrient release as a percentage of the total amount and corresponds to the left-side axis. The shaded area represents corresponding release in lbs nitrogen (N) per 1000 ft2, based on application at a recommended rate of 0.7-1.2 lb N/1000 ft2, and is related to the right-side axis.
Release curve is generated by placing a measured weight of XCU fertilizer into a known volume of water. Water is maintained at a constant temperature and the release of nutrient into the water is measured every seven days. Data is plotted to create the typical release curve.
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