These elements can be divided into two main groups based on where they are obtained by turf plants. In some ways, it’s been a healthy change.”. Accumulation of carbohydrates that can not be synthesized into proteins. Most lawn grasses need to have some nitrogen added annually in order to insure proper growth and resistance to pests. Therefore, one likely place for potassium deficiency to occur is in very sandy soils with low organic matter contents. Potassium (K) Potassium serves to promote the formation of strong cell membranes and improve tolerance to stress such as from cold, heat, wear, and disease. Potassium serves many roles in the grass plant and, if it becomes deficient can cause: 1. As a result, potassium deficiencies in turf may cause increased susceptibility to drought, winter injury, and disease. Refer to your local Yara area manager for detailed recommendation. This group can further be divided into three groups based on the quantities in which they are used by turf plaâ¦ It can be difficult to identify if overconsumption is a problem because little is known about the optimal concentration of potassium in the turf. Turf nutrition problems on greens and tees can be aggravated by the low height of cut which discour-ages deep rooting and makes the grass plants dependent on a limited medium volume. Some soils, especially golf greens, throughout Kansas are low in potassium, leaving turfgrass more susceptible to winter injury. Potassium deficiency: Potassium deficiency in turfgrass limits plant growth and leads to less tolerance to wear and other forms of stress. The target for many turf species is above 2 percent tissue potassium with 2.5 to 3.5 percent potassium being common for healthy grass. Number 8860726. Soil testing, including testing soil from affected and nonaffected areas, can identify plant-available K deficiency. How to Choose the Right Flower Fertilizer Type, How to Fertilize Your Garden or Lawn in Late Fall. Improves Root Growth and Drought Resistance During drought stress, root growth and the rates of potassium diffusion in the soil are significantly reduced. The standard convention for designating these quantities is by a percentage ratio. We apply the polymer coated product as a base supply of potassium at aeration and we supplement potassium throughout the year as needed through liquid applications.”. Informa Markets, a trading division of Informa PLC. “We like potassium sulfate on greens. Jeff Higgins is Valley Crest Golf Course Maintenance’s senior technical officer and is responsible for the formulation of cost effective agronomic programs for all courses maintained by VCGCM. “I feel like potassium is more valuable than some managers think,” he says. Fertiliser choices. “If a golf course can afford it, I would use a 1:2 ratio across the entire course.”, Higgins uses tissue analysis to determine potassium demand. “Fairways and other areas get a blended fertilizer that includes some potassium in the fall.”. If your lawn has an extreme potassium deficiency requiring muriate of potash, apply it during the cool morning hours and water it during the afternoon to ensure it does not burn your grass. One way to be sure of a lawnâs potassium level is to conduct a soil analysis. on the turf âs speciic needs. “There has been some debate in the industry about the importance of potassium,” Higgins says. For the rest of the course, application rates may depend on the budget.”, Tees get a good bit of attention and may need more potassium because of heavy traffic and damage. Too little potassium â¦ Potassium deficiency is also common in chalky or peaty soils with a low clay content. For example, if a 50-pound bag of fertilizer is labeled 20-20-20, it means there are 10 pounds each of nitrogen, phosphorus, and potassium (20 percent of 50 pounds). And over-applying nitrogen fertilizer can be detrimental to the lawn itself—either through creating too much top growth or possibly burning the grass plants. For a potassium deficiency, I also agree with your choice of using sulfate of potash (0-0-50) to remedy it. Potassium is a mineral and an electrolyte, which conducts electrical impulses throughout the body. Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. All rights reserved. The blades become streaked with yellow, turn brown at the tips and eventually die. On Farm This Week Grow Your Grass Focus on Fruit Top Potato Webinars Podcasts. Then apply LawnPro Lawn Thickener to repair the lawn and fill in patches of dead or affected lawn. Lines and paragraphs break automatically. “But in areas like the Southeast and the entire country this past summer where heat and other stresses take a toll on turfgrass, we need it.” Copyright © 2020. With the wide variation in soil K test levels often found within fields, it is possible to have deficient soil areas in fields that overall test adequate. SOP is preferable for lawns over muriate of potash (0-0-60 to 0-0-62, aka potassium chloride) as SOP has a lower salt index. Writer Bio What Do the Letters NPK Mean on a Fertilizer? Dr. Higgins has over 20 years experience in the turfgrass and pesticide industry and has held positions such as executive director of business development for Pursell Technologies Inc., Extension turfgrass specialist at Auburn University, director of golf services for Southern Turf Nurseries, director of specialty products for Pennington Seed, Inc., and dimension technical product manager for Monsanto. LawnPro 7-Day-Green is ideally balanced for providing nitrogen to lawn grasses and promoting green, lush dense lawns. If soil testing indicates adequate levels of phosphorous and potassium, use a fertilizer that has a â¦ Phosphorus and potassium are involved in many plant and soil relationships and are an integral part of any fertilization program. Another likely spot for potassium deficiency to occur is in hay fields. We apply between 2 pounds to 4 pounds of K per 1,000 square feet and brush the product into the open aeration holes.”, Potassium, he says, is very water soluble and also lacks binding strength to the cation exchange sites. Baseline is 1 percent potassium in water-soluble form will be a recommendation for how much potassium your soil requires good. Recession, Higgins says to further reduce potassium intake be the goal, aiming potassium... On the older leaves as well as scorched leaf tips and margins an NPK of 6 2.5... 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