Sugar applications to corn and soybeans
Wanting to increase yields and looking to other farmers such as Kip Cullers for information, some of the University of Nebraska's on-farm research producers decided to test whether applying sugar to their crops would be beneficial.
Nebraska On-Farm Research Corn Results
Using the application rates that Missouri farmer Kip Cullers uses, one Clay County producer applied 3 lb of sugar per 10 gallons of water at V7-V8 on corn in 2010 and 2011. (He purchased a pallet of cane or beet sugar from the local grocery store.) While Cullers tank-mixed the sugar solution with a post-herbicide application like glyphosate, the Clay County producer opted not to. To simulate any effect from the water application or driving through the field, he drove through the untreated check spraying water only.
Two years of research results showed no significant increase in yield. However, there was a noticeable difference in standability at harvest. This producer did not apply a foliar fungicide either year. When it came to harvest, this producer needed the reel in 2010 for the untreated check. Stalk rot ratings were taken using the pinch test two weeks prior to harvest. To him, the $1.25/acre of sugar was worth it to improve standability, even if yield was not significantly improved. The full study can be viewed here.
Several York County producers also tested this with one producer finding a non-statistical 2 bu/ac yield difference with the check yielding better while the other producers found a statisically significant 2 bu/ac increase to the sugar treatment. Another producer in Hamilton County is testing this using the corn product he grows. He is using 1 quart of corn sugar (high fructose corn syrup) per 10 gallons of water applied at V7-V8.
In 2012, a small plot study was conducted at UNL's South Central Ag Lab near Clay Center to determine any differences between sugar application, fungicide application, and untreated check in corn. All treatments were applied at R2. Because of the drought in 2012, there was minimal disease pressure, thus there were no significant differences between the three treatments regarding area under the disease progress curve. The untreated check did show the most stalk rot (via the push lodging test). The sugar application reduced the lodging rating by half and the fungicide application showed the lowest lodging rating. For yield, there were no significant yield differences with the untreated check yielding the most, followed by the fungicide and sugar applications. The entire study report can be found here.
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