{"id":973,"date":"2025-06-22T15:55:56","date_gmt":"2025-06-22T12:55:56","guid":{"rendered":"https:\/\/grossdorf.com\/product\/uan-28\/"},"modified":"2025-11-04T10:31:55","modified_gmt":"2025-11-04T08:31:55","slug":"uan-28","status":"publish","type":"product","link":"https:\/\/grossdorf.com\/en\/product\/uan-28\/","title":{"rendered":"UAN-28"},"content":{"rendered":"<p>UAN-28 is a liquid nitrogen fertilizer containing 28% total nitrogen in three forms:<\/p>\n<ul>\n<li>nitrate (NO\u2083\u207b) \u2013 rapidly absorbed by plants but easily leached;<\/li>\n<li>ammonium (NH\u2084\u207a) \u2013 slower uptake, less prone to leaching;<\/li>\n<li>amide (NH\u2082) \u2013 gradually converted in soil into ammonium form, ensuring prolonged action.<\/li>\n<\/ul>\n<p>Compared to UAN-32, UAN-28 has a lower nitrogen concentration, making it safer for foliar applications and more efficient under limited moisture conditions. Its superior crystallization resistance (\u201317\u202f\u00b0C) allows safe storage and transportation during cold seasons. <\/p>\n<p>The product is fully water-soluble, free from undissolved particles and sediment, and does not clog nozzles. It has a neutral to slightly alkaline pH (~7) and is non-acidifying, making it suitable for most soil types. <\/p>\n<h3><b>Key advantages:<\/b><\/h3>\n<ul>\n<li>reduced risk of phytotoxicity during foliar feeding;<\/li>\n<li>higher frost resistance \u2014 crystallization temperature down to \u201317\u202f\u00b0C;<\/li>\n<li>low salt stress for crops;<\/li>\n<li>fully compatible with micronutrients, stimulants, and pesticides (subject to compatibility testing);<\/li>\n<li>easy application \u2014 uniform distribution via sprayers, fertigation, or drip irrigation systems;<\/li>\n<li>effective even under challenging weather conditions.<\/li>\n<\/ul>\n<h3><b>Application:<\/b><\/h3>\n<ul>\n<li>base application \u2014 prior to sowing, particularly into moist soil;<\/li>\n<li>pre-sowing application \u2014 with incorporation into the soil;<\/li>\n<li>top dressing during vegetation \u2014 via sprayers (preferably streamer nozzles);<\/li>\n<li>fertigation \u2014 for vegetables and field crops;<\/li>\n<li>foliar application \u2014 in diluted form (8\u201312%).<\/li>\n<\/ul>\n<h3><b>Limitations and warnings:<\/b><\/h3>\n<ul>\n<li>avoid application during hot hours \u2014 apply in the morning or evening;<\/li>\n<li>do not apply to wet foliage without prior dilution;<\/li>\n<li>crystallization temperature: \u201317\u202f\u00b0C;<\/li>\n<li>precipitation or partial crystallization may occur at temperature extremes.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Liquid fertilizer &#8220;UAN-28&#8221;<br \/>\nUrea ammonium nitrate solution (28% total nitrogen)<\/p>\n<p><strong>TU U 20.1-36584168-002:2017<\/strong><\/p>\n<p><strong>Sales\/packaging terms:<\/strong> EXW, FCA, bulk<\/p>\n<p><strong>Delivery terms:<\/strong> own transport within Ukraine or self-pickup<\/p>\n","protected":false},"featured_media":813,"template":"","meta":[],"product_brand":[],"product_cat":[59,58,52],"product_tag":[],"class_list":{"0":"post-973","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-nitrogen-fertilizers-en","7":"product_cat-uan","8":"product_cat-wholesale","10":"first","11":"instock","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>UAN-28 - buy directly from the manufacturer (delivery or self-pickup)<\/title>\n<meta name=\"description\" content=\"UAN-28 by GROSSDORF \u2014 a stable nitrogen fertilizer for early spring application. 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