{"id":17352,"date":"2025-11-12T17:47:59","date_gmt":"2025-11-12T16:47:59","guid":{"rendered":"https:\/\/www.comagricola.com\/?p=17352"},"modified":"2025-11-12T17:47:59","modified_gmt":"2025-11-12T16:47:59","slug":"duo-professional-turf-fertilizer","status":"publish","type":"post","link":"https:\/\/www.comagricola.com\/en\/duo-professional-turf-fertilizer\/","title":{"rendered":"DUO \u2014 Professional Turf Fertilizer"},"content":{"rendered":"<h1 data-start=\"68\" data-end=\"428\">The strategic role of potassium nitrate in autumn turf nutrition<\/h1>\n<p><a href=\"https:\/\/www.comagricola.com\/wp-content\/uploads\/2022\/05\/Scheda-DUO.pdf\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-17357 aligncenter\" src=\"https:\/\/www.comagricola.com\/wp-content\/uploads\/2025\/11\/Professional-turf-fertilizer-1-1-300x169.png\" alt=\"\" width=\"651\" height=\"367\" srcset=\"https:\/\/www.comagricola.com\/wp-content\/uploads\/2025\/11\/Professional-turf-fertilizer-1-1-300x169.png 300w, https:\/\/www.comagricola.com\/wp-content\/uploads\/2025\/11\/Professional-turf-fertilizer-1-1-1024x576.png 1024w, https:\/\/www.comagricola.com\/wp-content\/uploads\/2025\/11\/Professional-turf-fertilizer-1-1-768x432.png 768w, https:\/\/www.comagricola.com\/wp-content\/uploads\/2025\/11\/Professional-turf-fertilizer-1-1-100x56.png 100w, https:\/\/www.comagricola.com\/wp-content\/uploads\/2025\/11\/Professional-turf-fertilizer-1-1-1536x864.png 1536w, https:\/\/www.comagricola.com\/wp-content\/uploads\/2025\/11\/Professional-turf-fertilizer-1-1-1170x658.png 1170w, https:\/\/www.comagricola.com\/wp-content\/uploads\/2025\/11\/Professional-turf-fertilizer-1-1-600x338.png 600w, https:\/\/www.comagricola.com\/wp-content\/uploads\/2025\/11\/Professional-turf-fertilizer-1-1.png 1920w\" sizes=\"auto, (max-width: 651px) 100vw, 651px\" \/><\/a><\/p>\n<p data-start=\"68\" data-end=\"428\">Autumn is a physiological transition period for natural sports fields: the turf must recover energy after the intense summer season and prepare for winter dormancy. At this time, nutrition should focus not on vegetative growth, but on rebuilding reserves, strengthening tissues, and improving the turf\u2019s response to mechanical stress from play and maintenance.<\/p>\n<p data-start=\"430\" data-end=\"617\">To meet these specific needs, <strong data-start=\"460\" data-end=\"483\">DUO \u2013 18-0-15 + 2Mg<\/strong>, a fertilizer from the <strong data-start=\"507\" data-end=\"519\">Turf-on\u00ae<\/strong> line, is designed to deliver a balanced input that aligns with the seasonal phase of sports turf.<\/p>\n<h2 data-start=\"619\" data-end=\"674\">The value of potassium from potassium nitrate (KNO\u2083)<\/h2>\n<p data-start=\"676\" data-end=\"962\">All the potassium in DUO comes from <strong data-start=\"712\" data-end=\"740\">potassium nitrate (KNO\u2083)<\/strong>\u2014a highly soluble, stable, and fully available source. Compared with other forms (such as potassium sulfate or potassium chloride), KNO\u2083 offers higher efficiency and complete physiological compatibility with plant tissues.<\/p>\n<p data-start=\"964\" data-end=\"1004\">Potassium supplied as potassium nitrate:<\/p>\n<ul data-start=\"1006\" data-end=\"1338\">\n<li data-start=\"1006\" data-end=\"1069\">\n<p data-start=\"1008\" data-end=\"1069\">increases the mechanical strength of leaf blades and culms;<\/p>\n<\/li>\n<li data-start=\"1070\" data-end=\"1154\">\n<p data-start=\"1072\" data-end=\"1154\">improves osmotic regulation, reducing cellular dehydration under thermal stress;<\/p>\n<\/li>\n<li data-start=\"1155\" data-end=\"1260\">\n<p data-start=\"1157\" data-end=\"1260\">stabilizes photosynthesis and sugar metabolism, supporting the accumulation of carbohydrate reserves;<\/p>\n<\/li>\n<li data-start=\"1261\" data-end=\"1338\">\n<p data-start=\"1263\" data-end=\"1338\">enhances low-temperature tolerance, improving the turf\u2019s winter resilience.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1340\" data-end=\"1521\">In addition, the nitrate (NO\u2083\u207b) associated with potassium ensures a <strong data-start=\"1408\" data-end=\"1445\">quick response even in cool soils<\/strong>, enabling rapid root uptake in the weeks leading up to vegetative dormancy.<\/p>\n<h2 data-start=\"1523\" data-end=\"1567\">Nitrogen balance and continuous nutrition<\/h2>\n<p data-start=\"1569\" data-end=\"1665\">DUO provides <strong data-start=\"1582\" data-end=\"1612\">18 units of total nitrogen<\/strong>, delivered in forms with different release dynamics:<\/p>\n<ul data-start=\"1667\" data-end=\"1802\">\n<li data-start=\"1667\" data-end=\"1706\">\n<p data-start=\"1669\" data-end=\"1706\"><strong data-start=\"1669\" data-end=\"1680\">nitrate<\/strong> (for immediate effect),<\/p>\n<\/li>\n<li data-start=\"1707\" data-end=\"1755\">\n<p data-start=\"1709\" data-end=\"1755\"><strong data-start=\"1709\" data-end=\"1723\">ammoniacal<\/strong> (for an intermediate effect),<\/p>\n<\/li>\n<li data-start=\"1756\" data-end=\"1802\">\n<p data-start=\"1758\" data-end=\"1802\"><strong data-start=\"1758\" data-end=\"1776\">methylene urea<\/strong> (for a prolonged effect).<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1804\" data-end=\"1981\">This composition prevents excessive top growth and ensures steady, uniform nutrition\u2014supporting root metabolism without stimulating undesirable leaf growth at this time of year.<\/p>\n<p data-start=\"1983\" data-end=\"2124\">The result is a <strong data-start=\"1999\" data-end=\"2030\">dense, elastic, and durable<\/strong> turf with balanced physiology and an active root system, even under sub-optimal temperatures.<\/p>\n<h2 data-start=\"2126\" data-end=\"2147\">Directions for use<\/h2>\n<p data-start=\"2149\" data-end=\"2214\">Application of <strong data-start=\"2164\" data-end=\"2198\">DUO \u2013 18-0-15 + 2Mg (Turf-on\u00ae)<\/strong> is recommended:<\/p>\n<ul data-start=\"2216\" data-end=\"2470\">\n<li data-start=\"2216\" data-end=\"2287\">\n<p data-start=\"2218\" data-end=\"2287\">from <strong data-start=\"2223\" data-end=\"2253\">late September to November<\/strong>, before winter growth slowdown;<\/p>\n<\/li>\n<li data-start=\"2288\" data-end=\"2383\">\n<p data-start=\"2290\" data-end=\"2383\">at a <strong data-start=\"2295\" data-end=\"2354\">rate adjusted to soil texture and maintenance intensity<\/strong>, typically <strong data-start=\"2366\" data-end=\"2380\">30\u201335 g\/m\u00b2<\/strong>;<\/p>\n<\/li>\n<li data-start=\"2384\" data-end=\"2470\">\n<p data-start=\"2386\" data-end=\"2470\">on <strong data-start=\"2389\" data-end=\"2444\">sports turfs, golf courses, and ornamental surfaces<\/strong> subject to heavy traffic.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2472\" data-end=\"2595\">Regular autumn use increases structural strength, maintains color, and improves the turf\u2019s <strong data-start=\"2563\" data-end=\"2582\">spring response<\/strong> at green-up.<\/p>\n<hr data-start=\"2597\" data-end=\"2600\" \/>\n<p data-start=\"2602\" data-end=\"2897\"><strong data-start=\"2602\" data-end=\"2609\">DUO<\/strong> is a precision nutrition technology for autumn turf management. The balance between modulated nitrogen and potassium nitrate\u2014combined with the <strong data-start=\"2753\" data-end=\"2784\">total absence of phosphorus<\/strong>\u2014helps the turf face the cold season with plants that are stronger, more resilient, and physiologically balanced.<\/p>\n<p data-start=\"2899\" data-end=\"3085\" data-is-last-node=\"\" data-is-only-node=\"\">\ud83d\udc49 For detailed technical specifications and application protocols, visit <strong data-start=\"2973\" data-end=\"2996\"><a class=\"decorated-link\" href=\"http:\/\/www.comagricola.com\/\" target=\"_new\" rel=\"noopener\" data-start=\"2975\" data-end=\"2994\">www.comagricola.com<\/a><\/strong> or contact the <strong data-start=\"3012\" data-end=\"3042\">Comagricola technical team<\/strong> for personalized advice on turf nutrition.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The strategic role of potassium nitrate in autumn turf nutrition Autumn is a physiological transition period for natural sports fields: the turf<\/p>\n","protected":false},"author":1,"featured_media":17353,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[177],"tags":[],"class_list":["post-17352","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-turf-care"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DUO \u2014 Professional Turf Fertilizer - Comagricola Green Europe<\/title>\n<meta name=\"description\" content=\"Prepare turf for winter. 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