Figure 1. Nitrogen uptake by corn. Adapted from Richie, et.al, 2005 (How a Corn Plant Develops).
Figure 2. Severe nitrogen deficiency symptoms are evident in this field that remained saturated due to excessive rainfall.
Fall Application is used in areas where soil temperatures usually remain below 50 F from late fall to spring.
Early Spring (Preplant) Application is commonly used in areas where growers are able to complete this practice without delaying planting beyond the optimum window.
At Planting Application has 1 distinct advantage over the others – when the field is fit to plant, it is also fit for N application, which makes its success less dependent on the weather.
In-season (Side-dress) Application allows for adjustments to planned N supply based on weather variations.
Figure 3. Side-dress application of anhydrous ammonia at the V5 to V6 corn growth stage. Photo courtesy of John Deere.
N-Serve and Instinct are nitrification inhibitors that contain the active ingredient nitrapyrin, which acts against the bacteria responsible for converting ammonium to nitrate.
Agrotain helps prevent losses of N when urea is surface-applied and not incorporated into the soil.
Agrotain Plus is an additive specifically for UAN solution.
ESN, Environmentally Smart Nitrogen, is another type of stabilized N.
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The foregoing is provided for informational use only. Please contact your Pioneer sales professional for information and suggestions specific to your operation. Product performance is variable and depends on many factors such as moisture and heat stress, soil type, management practices and environmental stress as well as disease and pest pressures. Individual results may vary.
Encirca® services are provided subject to the terms and conditions of purchase which are part of the purchase documents.