Evaluation of Starter Fertilizers for Winter Wheat Production in Oklahoma.

Although there are many farmers that have been using starter fertilizer for years now in their wheat production programs, there has been no research performed in Oklahoma on comparing traditional fertilizer sources to new specialty fertilizer that has been advertised to farmers around the state. Producers are looking to researchers for answers as they inquire upgrading their seeding and fertilizer systems to incorporate advancements in technology. It has been shown that providing in row phosphorus and nitrogen to wheat will increase vigor through winter months. For many wheat producers in Oklahoma this is a plus because of the dual purpose grazing they use it for before hollow stem. Other nutrients including K, S, and micronutrients will also be compared to test a yield bump compared to major N and P fertilizer types. Objectives of this research are to compare different fertilizer products in-furrow with wheat seed. Row spacing, nitrogen top dress, plant population, as well as seed variety were consistent. Three locations were planted within a 30 mile radius of Stillwater, OK each containing three reps of twelve treatments, including a check. The three locations were chosen to represent expected soil environment. One location had a soil test P level below sufficiency, one location had a soil pH below 5.0, and the final location had adequate levels of fertility and soil pH.  All locations are under no-till management. Plot size measured 3m by 6m and at maturity the center 1.5m was harvested with a plot combine. Yield, test weight, grain quality, and nutrient concentrations were recorded.