Manure sidedressing research summary from OSU Extension


first_imgShare Facebook Twitter Google + LinkedIn Pinterest Sidedressing manure opens up new windows of application time for commercial manure application while also providing valuable nutrients to growing crops when they can be immediately used.“That is a down time for commercial applicators. They currently do not have that window available to apply manure from May 1 to early July,” said Glen Arnold, Ohio State Extension manure specialist. “We all know we are going to spend $100 or $125 per acre on sidedressing corn. We are learning that we could go out there with 6,000 gallons of swine manure and accomplish the same thing.”Arnold has now conducted several years of studies of manure application.“We started with dairy and swine manure on small plots and swine manure on wheat. We were very pleased with how that worked,” Arnold said. “Then we tried sidedressing corn because it uses much more nitrogen. You have to haul that manure at some point. Every gallon we can put on a growing crop in the early spring and summer is one that we don’t have to put on in the fall. If we get it on the growing crop we have a better chance of catching the nitrogen, potassium and phosphorus and other nutrients that are there. We are also working to convert to drag hose technology for application.”In response to the success demonstrated in the research, several farmers in Ohio have started sidedressing corn with livestock manure using a manure tanker and incorporation toolbar. Manure tankers can be adapted for corn rows by using narrow wheels and wheel spacers.Here is a summary from Arnold.  The 28% UAN nitrogen rates and manure nitrogen rates were 200 units of nitrogen per acre. The swine manure application rate was 5,200 gallons per acre to get 200 units of nitrogen. The dairy manure application rate 13,577 gallons per acre to get 130 units of nitrogen per acre. The dairy reps received additional nitrogen as incorporated 28% UAN just prior to the manure being applied to reach the 200-unit goal. Manure was applied using a manure tanker and Dietrich injection units with covering wheels attached.Pre-emergent manure applications were made within five days of the corn being planted. Post-emergent manure applications were made at the V3 stage of corn growth.The 2011, 2012 and 2014 growing seasons experienced periods of drought. The 2013 growing season was very good, with adequate moisture through July. The 2015 growing season was very wet.Stand populations were approximately 31,000 plants per acre across all treatments. The manure did not appear to reduce the plot stands in any year. All manure was applied with manure tanker and Dietrich tool bar.Grain samples were analyzed each year for vomitoxin. There were no differences between the treatments. The manure treatment grain samples did run about 0.5% higher in moisture at harvest time.The incorporated manure applications were approximately 20 bushels per acre higher than the 28% UAN treatments over the five-year study. Moisture from the manure was beneficial to the crop in the dry years. The surface applied manure treatments were similar in yield to the incorporated 28% UAN treatments. Drag hose plot resultsThe 2015 growing season was the second year for a corn post-emergent drag hose study. The purpose of this plot is to determine how far along in development the corn crop can be before the damage from a drag hose would rule out sidedressing with livestock manure. A 15-foot long drag hose filled with water was used for this study.The six-inch diameter drag hose was pulled across each plot twice (going in opposite directions) at corn growth stages one through five (stage five was not completed in 2015 due to excessive rainfall). The tractor speed was approximately 4 miles per hour. The plot was replicated four times in a randomized block design. The 2014 plot experienced an unusually dry growing season, especially in the weeks following the drag hose treatments. Total precipitation received by this plot from planting until Oct. 1 was 11.62 inches. The 2015 plot experienced an unusually wet growing season, especially in the weeks during the drag hose treatments. Total precipitation received by this plot from planting until Oct. 1 was 22.12 inches. The results of this two-year research study suggest corn could be sidedressed with liquid livestock manure using a drag hose, up to growth stage three (three leaf collars), without a statistically significant yield loss. This study will be repeated in 2016 to establish a larger data base.Below are links to videos of the swine manure application process to emerged corn in Ohio. Harrod Farms applied almost one million gallons to 160 acres of corn (five fields from five barns) over two days in May 2015. The rate was about 6,200 gallons per acre and this supplies the N, P, & K needed by the 2015 corn crop and the P & K needed for the 2016 soybean crop. The only additional nitrogen for the corn was 10 gallons per acre of 28% UAN as row starter.Manure tanker application to corn: go.osu.edu/mtanker• Harrod Farms 2015: go.osu.edu/mHF15• Harrod Farms 2014 (Field yielded 226 bushels per acre): go.osu.edu/mHF14.last_img