Ag systems nh3 gopher1/15/2024 ![]() ![]() There are several different forms of N that can be used for fertigation. Because of its high solubility, N is also extremely susceptible to leaching. Nitrogen fertilizers have a high solubility, which makes them relatively easy and effective to apply with an irrigation system. The most common nutrient that is applied by fertigation in Utah is nitrogen (N). The purpose of this fact sheet is to provide general information on forms of fertigation for primary plant nutrient, fertigation timing, and fertigation economics. A variety of soluble products are available at local agronomic retailers. In addition to the liquid fertilizers, soluble fertilizers are an additional option for supple- menting crops during the growing season. Liquid fertilizer such as Urea Ammonium Nitrate (UAN), Ammonium Thiosulfate (ATS), Ammonium Polyphosphate (APP), and Anhydrous Ammonia (NH3) are most commonly used due to their convenience, and are currently the primary forms sold by fertilizer companies for fertigation in Utah. In most cases, fertilizer used for fertigation is available in liquid solutions or in a soluble form. Utah growers most commonly fertigate corn (33-41% of the total irrigated corn acres) and orchards (37% of total irrigated acres), but it is also used to a lesser degree on small grains, alfalfa, and other hay (9-23% of the total irrigated of these crops). In the 2013 agriculture census, nearly 135,000 acres of irrigated cropland in Utah utilized fertigation (USDA-NASS, 2014). It can be implemented in surface, sprinkler, and drip systems. ![]() Fertigation is the application of fertilizer through an irrigation system (Fig 1). ![]()
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