AGR-198: Sulfur Fertilization in Kentucky

Greg Schwab | February 5, 2025 (Revised)

There are a lot of misunderstandings regarding sulfur (S) nutrition for Kentucky crops. Sulfur is considered a seconda r y pla nt nutrient because, although the crop requirement for S is relatively large, it is usually found in soil at concentrations adequate for plant growth and yield so that no fertilizer S is needed. For many years, soil S was maintained by atmospheric deposition. However, more stringent clean air standards require greater removal of S during burning of fossil fuels. That fact, along with increasing crop yields, has caused many Kentucky grain producers to begin to question if S fertilization will increase yield.

AGR-16: Taking Soil Test Samples

Lloyd Murdock, Greg Schwab, Frank Sikora, Bill Thom | March 13, 2023 (Revised)

The most important part of making fertilizer recommendations is collecting a good, representative soil sample. Soil test results and fertilizer recommendations are based solely on the few ounces of soil submitted to the laboratory for analysis. These few ounces can represent several million pounds of soil in the field. If this sample does not reflect actual soil conditions, the results can be misleading and lead to costly over- or under-fertilization. It is necessary to make sure that the soil sample sent to the laboratory accurately represents the area sampled.

AGR-210: Fertilizer Management in Alfalfa

David Ditsch, Lloyd Murdock, Edwin Ritchey, Greg Schwab | January 8, 2014 (New)

Alfalfa is a high quality, valuable forage crop that can be successfully produced on most well-drained soils in Kentucky for hay, silage, and grazing. Fertilizing alfalfa can be uniquely challenging because it is a high-yielding crop that removes a tremendous amount of soil nutrients when compared to other crops grown in Kentucky. A thorough understanding of alfalfa's growth habits, nutrient requirements, and soil nutrient supply mechanisms is necessary to effectively manage fertilizer inputs and maximize profitability while minimizing environmental impact.

PR-622: Soybean Management Verification Program, 2010

Jim Herbek, Chad Lee, Lloyd Murdock, Jason Sarver, Greg Schwab | April 6, 2011 (New)

The 2010 Soybean Management Verification Program (SoyMVP) consisted of 16 fields across western Kentucky which were split to give seven direct comparisons between University of Kentucky recommendations and producer practices for soybean production.

PR-605: Soybean Management Verification Program, 2009

Jim Herbek, Chad Lee, Lloyd Murdock, Jason Sarver, Greg Schwab | March 14, 2011 (New)

The 2009 Soybean Management Verification Program (SoyMVP) consisted of 16 fields across Western Kentucky, which were split to give eight direct comparisons between University of Kentucky recommendations and producer practices for soybean production.

AGR-185: Nitrogen Transformation Inhibitors and Controlled-Release Urea

Lloyd Murdock, Greg Schwab | April 21, 2010 (Major Revision)

The soaring cost of fossil fuels is an indicator that nitrogen fertilizer prices are going to remain high for the foreseeable future. With higher N prices, many producers are trying to evaluate the usefulness of several N additive products in their production systems. High N prices make these products more attractive because it takes fewer pounds of saved N to offset the price of the additive. Producers should have a good understanding of how these products work in order to make informed decisions regarding their use.

AEN-93: Proper Tire and Ballast Inflation

Sam McNeill, Greg Schwab, Scott Shearer, Tim Stombaugh, John Wilhoit | October 23, 2008 (New)

AGR-17: Double-Cropping Land for Silage Production

Chad Lee, Lloyd Murdock, Greg Schwab | October 31, 2007 (Minor Revision)

AGR-193: Evaluating Flood Damage in Corn

Jim Herbek, Chad Lee, Lloyd Murdock, Greg Schwab | July 27, 2007 (New)

AGR-92: Sampling Plant Tissue for Nutrient Analysis

Chad Lee, Bob Pearce, Greg Schwab, Bill Thom | May 8, 2007 (Minor Revision)