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  Document E-1022 Nitrogen Rich Strips for Wheat, Corn, and Other Crops

By Bill Raun, John Solie, Jerry May, Hailin Zhang, Jonathan Kelly, Randy Taylor, Brian Arnall and Ivan Ortiz-Monasterio. This circular discusses using nitrogen strips to help determine if your crop is at optimum efficiency. Reviewed March 2015.

2 MB
  Document E-1039 Oklahoma Soil Fertility Handbook

This handbook includes information about soil problems, fertilizer, soil research, precision nutrient management and much more.

21 MB
  Document PSS-2254 Alum-Treated Poultry Litter as a Fertilizer Source

By Chad Penn and Hilin Zhang. This fact sheet discussed the use of alum-treated poultry litter as a fertilizer. Revised February 2013.

825 KB
  Document PSS-2268 Alternative Poultry Litter Storage Technique for Improved Handling, Transport, and Application: The "Mass Reduction System"

By Chad Penn, Jeff Vitale, Josh Payne, Jason Warren, and Hailin Zhang. This fact sheet discusses alternative methods for storing and handling poultry litter. Reviewed January 2015.

239 KB
  Document PSS-2281 Evaluation of Phosphorus Fertilizer Recommendation in No-Till Winter Wheat

By Bryan Rutter, Brian Arnall and Patrick Watkins. Phosphorus is a common yield-limiting factor for wheat production in Oklahoma. Deficiencies in wheat can result in reduced root development, fewer tillers and stunted plant growth, leading to reduced forage and grain yield. Phosphorus is considered immobile in soils. Thus, phosphorus fertilizer recommendations are based on plant-available soil phosphorus concentration rather than the yield goal of the crop.

91 KB