A new analysis has identified the top factors accounting for yield variability in processing sweet corn (used for canned and frozen products), including one within the control of processors.
A new analysis from the University of Illinois Urbana-Champaign and the USDA-Agricultural Research Service has identified the top factors accounting for yield variability in processing sweet corn , including one within the control of processors.
The analysis drew from confidential industry data on 67 variables relating to crop genetics, management, weather, and soil factors from fields in the Upper Midwest and Pacific Northwest, where most of the nation's processing sweet corn is grown. Williams and co-author Daljeet Dhaliwal, who completed his doctorate in the Department of Crop Sciences, used machine learning techniques to narrow down which of the dozens of factors correlated most strongly to yield across nearly 30 years.
However, the million-dollar question doesn't have a satisfying answer, as the analysis doesn't differentiate or rank the seed companies. Williams said there is a reason for that outside the confidentiality agreement. Another striking variable, ranking just below seed company, was high nighttime temperature. Warmer-than-usual nights increase respiration, which offsets gains made during daytime photosynthesis. According to the analysis, sweet corn yield starts taking a hit above 16 degrees Celsius . Field corn yield, by contrast, doesn't start declining until nighttime temperatures exceed 21 C.
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