In descending order, by date published.
Most Kentucky soils need to have lime applied in order to keep the pH in the optimum range for growing crops. Lime applications should always be based on a good soil test that takes into account the existing pH and the buffering capacity of the soil. However, even when all this is done and lime is applied as recommended, the desired change in soil pH may not occur. The problem may be due to the use of low quality lime.
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.
Soil acidity is one of the most important soil factors affecting crop growth and ultimately, yield and profitability. It is determined by measuring the soil pH, which is a measure of the amount of hydrogen ions in the soil solution. As soil acidity increases, the soil pH decreases. Soils tend to be naturally acidic in areas where rainfall is sufficient to cause substantial leaching of basic ions (such as calcium and magnesium), which are replaced by hydrogen ions. Most soils in Kentucky are naturally acidic because of our abundant rainfall.
The fragipan is a naturally occurring restrictive soil horizon that virtually stops water movement and root growth through the soil. It is commonly located 18-32 inches below the surface of most of Kentucky's fragipan soils. The dense nature of this layer is due to the cementation and binding of the soil particles with a silicate rich amorphous aluminosilicate in association with iron. The binding agents seal the pores and pack soil particles close together. The fragipan is found in 2.7 million acres in Kentucky, and about 50 million acres in the United States.
Authors: Bill Bruening, J.D. Green, John Grove, Jim Herbek, Don Hershman, Doug Johnson, Chad Lee, Jim Martin, Sam McNeill, Michael Montross, Lloyd Murdock, Doug Overhults, Greg Schwab, Lee Townsend, Dick Trimble, Dave Van Sanford
The soft red winter wheat grown in Kentucky is the fourth most valuable cash crop in the state. Winter wheat has been an integral part of crop rotation for Kentucky farmers. Wheat is normally harvested in June in Kentucky and provides an important source of cash flow during the summer months.
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.
Nitrogen (N) applications on wheat using sensor-based technology can improve both N use efficiency and yields.
The 2012 Soybean Management Verification Program (SoyMVP) enrolled 19 fields across Western Kentucky, providing ten direct comparisons between University of Kentucky recommendations and producers practices for soybean production. All fields were scouted weekly and recommendations were made on the university portion of the field based on established thresholds and observations from agronomic research. The objective of these comparisons is to validate university research and identify areas for more research.
The goal of SoyMVP is to verify applied research at the University of Kentucky and to identify whether University of Kentucky recommendations are adequate.
The concept of stockpiling is pretty straightforward, but the challenge each year is to determine the likelihood that this practice will be profitable given the economic and agronomic conditions present at mid-summer. This practice can yield significant benefits, but it also carries significant costs. These benefits and costs must be quantified and compared to assess the overall profitability of the practice.
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.
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.
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.
The Corn and Soybean Production Calendar was developed to help producers prioritize and schedule work events in a timely fashion on the farm. Weather events and equipment breakdowns rarely follow an organized schedule. However, if other practices within the farming operation are prioritized, perhaps a producer can better address the emergencies that will occur.
Historically, wheat planting in Kentucky has involved tillage. With conventional tillage practices, most residues from the previous crop are cut and buried prior to seeding wheat. No-till wheat planting eliminates tillage and reduces soil erosion, particularly on sloping soils, as well as reducing labor, machinery, and energy costs.
No-tillage is the preferred method of crop production for most Kentucky farmers. No-tillage has been proven to increase soil quality and decrease the risk of soil compaction as compared to crop production using annual tillage. However, with the use of heavy farm equipment, soil compaction is always a threat with either tillage or no-tillage. The possibility of soil compaction and its effect on crop production is a constant concern to many farmers using no-tillage. If soil compaction occurs, is there a difference between the two tillage systems on how it affects crop production and the recovery of the soil with and without subsoil tillage? The following study was conducted to help producers and advisors understand soil compaction and its effects on corn and soybean production as well as the ability of the two tillage systems to recover from soil compaction.
Authors: Bill Bruening, Dottie Call, Mike Collins, David Ditsch, Charles Dougherty, Dennis Egli, Larry Grabau, J.D. Green, John Grove, Jimmy Henning, Jim Herbek, John James, Garry Lacefield, Jim Martin, Lloyd Murdock, Gene Olson, Gary Palmer, Todd Pfeiffer, Tim Phillips, Monroe Rasnake, Robert Spitaleri, Norm Taylor, Dennis Tekrony, Bill Witt
Authors: Richard Barnheisel, Morris Bitzer, Jimmie Calvert, Glenn Collins, Mike Collins, Mark Coyne, David Ditsch, Charles Dougherty, Larry Grabau, J.D. Green, Dan Grigson, John Grove, Dennis Hancock, Jimmy Henning, Jim Herbek, John James, John Johns, A.D. Karathanasis, Brenda Kennedy, Garry Lacefield, Eugene Lacefield, Len Lauriault, Bill Maksymowicz, Jim Martin, Bob Miller, Tom Mueller, Gregg Munshaw, Lloyd Murdock, Gary Palmer, Bob Pearce, Todd Pfeiffer, Chuck Poneleit, A.J. Powell, Monroe Rasnake, Edwin Ritchey, Scott Shearer, Frank Sikora, Robert Spitaleri, Norm Taylor, Charles Tutt, Dave Van Sanford, Paul Vincelli, Ken Wells, David Williams, Bill Witt
Departments: Animal and Food Sciences, Biosystems and Agricultural Engineering, County Extension, Plant and Soil Sciences, Plant Pathology, Regulatory Services
Series: Progress Report (PR series)
Size: 550 kb
Authors: Richard Barnheisel, Mike Barrett, Morris Bitzer, Bill Bruening, Lowell Bush, Dottie Call, Mike Collins, Mark Coyne, Maelor Davies, David Ditsch, Charles Dougherty, Dennis Egli, Don Ely, Larry Grabau, J.D. Green, John Grove, Jimmy Henning, Jim Herbek, Don Hershman, John Johns, Doug Johnson, Fred Knapp, Garry Lacefield, Eugene Lacefield, Bill Maksymowicz, Jim Martin, Lloyd Murdock, Gary Palmer, Bob Pearce, Todd Pfeiffer, Tim Phillips, Chuck Poneleit, A.J. Powell, Monroe Rasnake, Charles Slack, Scott Smith, Robert Spitaleri, Norm Taylor, Dennis Tekrony, Bill Thom, Charles Tutt, Dave Van Sanford, Ken Wells, David Williams, Bill Witt
Authors: Lloyd Murdock
Authors: Lloyd Murdock