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Corn fields add to muggy, humid Midwestern temps VOL. 10 • NO. 32
It’s not just the heat; it’s the humidity and “corn sweat” making muggy Midwestern summers feel even hotter. In agricultural states, such as Illinois, large-scale fields of corn releasing water through their leaves boost humidity levels, making people feel hotter. One acre of corn can add between 3,000 to 4,000 gallons of water a day to the atmosphere, according to the U.S. Geological Survey. Illinois State Climatologist Trent Ford with the Illinois State Water Survey says scientists in major agricultural states have studied how crops affect local weather patterns since the mid-1980s. “The amount of humidity coming off crops does matter,” Ford says. “It’s less than what’s being blown in off the Gulf of Mexico, but our growing crops do have a documented impact.” Corn doesn’t actually sweat, says Doug Gucker, a University of Illinois Extension local foods small farms educator serving Central Illinois. It breathes. “It is more like when humans exhale; our breath has a higher water content than the surrounding air,” Gu-
cker says. “It is the same thing in the corn field, except plants do not have lungs, so they transpire.” When temperatures are high, plants open pores on their leaves called stomata, bringing in oxygen and releasing carbon dioxide and excess water. The water evaporates, cooling the plant. Corn growth peaks around the same time summer temperatures do, intensifying the effect. “Corn is a grass,” says Russel Higgins, Extension commercial agriculture educator in Northern Illinois. “It’s taller and has more leaf area, so it transpires more water than a soybean crop. The corn crop demand for water also peaks earlier in the season than it does for the soybean crop.” The hotter it is, the more plants transpire, as long as they have available water. Anyone who has detasseled or scouted corn knows exactly how standing in a field mid-July can feel. “The corn is 7 to 9 feet tall, and there’s often limited wind movement in the field, and all those plants are transpiring,” Higgins says. “Under those conditions you can feel the el-
Native, natural landscaping webinar McHenry County Conservation District is hosting a Native and Natural Landscaping Webinar on Thursday, Aug. 6, from 7–8:30 p.m. Learn how to use native plants around your home to beautify your property, provide habitat for butterflies, birds and bees, and gain benefits such as improved storm water drainage and healthy soil. This presentation by members of the Wildflower Preservation and Propagation Committee will show examples from their “Native Garden in Your Yard” program, which provides inspiration, encouragement, and help to homeowners who wish to transform their traditional lawn and garden spaces into havens
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evated humidity in there.” Most Illinois heat waves come with higher levels of humidity, Ford says. Some of that is from the state’s 10 million acres of corn. “In the summer we have an actively growing crop as well as natural vegetation,” Ford says. “That means that a pretty decent amount of our humidity near the surface is coming from transpiration.” The added humidity creates conditions for thunderstorms, but crops may also be preventing regional heat
waves. While Ford says the number of extremely hot days are increasing in other regions, the Midwest has escaped the trend, and researchers are trying to find out why. “The cooling effect that transpiration provides may be reducing the number of hot days,” Ford says. However, corn stops transpiring when moisture levels are low, which lowers humidity levels and causes a spike in daytime temperatures. Looking ahead, Higgins says that higher humidity levels, which slows
moisture loss from crops, may be beneficial since June was warmer and drier than usual. An article in the Illinois Bulletin by Dr. Emerson Nafziger notes that 20 percent of Illinois is currently “abnormally dry.” Sources: Russel Higgins, Extension Educator, Commercial Agriculture; Doug Gucker, Extension Educator, Local Food Systems and Small Farms; Trent Ford, Illinois State Water Survey, Illinois State Climatologist. Writer: Emily Steele, Media Communications Coordinator
Facilities report new COVID-19 cases BY CAPITOL NEWS ILLINOIS
A juvenile detention facility and two mental health centers in Illinois each reported outbreaks of COVID-19 on Tuesday, July 21. The Illinois Department of Juvenile Justice youth center in St. Charles reported 16 new cases of COVID-19 in staff and three new cases among youth at the facility. This prompted “increased mitigation and infection control measures,” according to a news release from the Illinois Department of Public Health, which said all youth and staff have been tested for the virus and the facility is “implementing programming changes to reduce further spread.”
IDPH also reported that Chester Mental Health Center in Randolph County reported 32 confirmed cases – 27 staff and five residents – while Shapiro Developmental Center in Kankakee County reported seven confirmed cases – one resident and five staff. “I want to remind everyone that this pandemic is still very much here,” Gov. JB Pritzker said at an unrelated event in Collinsville. “And it remains a very serious threat. People are getting sick and dying. The Metro East region has one of the highest rates of cases and transmission in the state, even as the rest of the state remains fairly steady.”
He added: “You’ve all seen the death toll rising in Florida and Texas, in Arizona, Alabama, North Carolina, in California. This is no joke. This is no hoax. Metro East is at risk, as any area of the country, of tipping over to the higher case and death counts that we see in other parts of the country.” Pritzker said the state “will take immediate action to impose additional mitigations” if there’s an increase in the rolling positivity rate for COVID-19 tests along with increased hospital admissions or decreased surge capacities. Action will also follow if a region passes an 8 percent rolling seven-day average.
for native wildflowers and other plants. Applications will be available for mentor match-ups. The webinar will also touch on using native plants on a larger scale, such as restoration projects at McHenry County Conservation District sites. For adults, ages 14 years and older. Space is limited. Residents free; non-residents $5. Registration deadline is Aug. 4. Webinar sign-in details will be sent to registrants before the program date. Register online at www.MCCDistrict.org, or by mail – Prairieview Education Center, 2112 Behan Road in Crystal Lake. For more information call 815-479-4779.
Robert Gee convicted of killing 10-week-old son On July 20, 2020, Robert Gee, 34, of Marengo, was convicted of Involuntary Manslaughter in the May 23, 2011, death of his 10-week-old son. Judge C. Robert Tobin III found Gee guilty after a two-day bench trial. Witnesses testified that Gee admitted to shaking his infant son, causing the child’s death. Sentencing is set for Sept. 24, at 2 p.m. in front of Judge Tobin. Involuntary Manslaughter is a Class 2 felony, with a special sentencing range of 3-14 years, followed by up to two years of mandatory supervised release. Gee will have to serve at least 50 percent of his sentence.
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From harvest to market Robert Gee
Have you considered selling your homemade foods at a farmers market? There are basic guidelines that growers and vendors must observe in preparation for farmers market sales. Learn about the latest legislation concerning Illinois Cottage Food law, and how to comply with safety standards to ensure that cottage food products are safe, healthy, and enjoyable for all. Visit the University of Illinois Extension website at web.extension.illinois.edu/cottage/index.cfm to explore Illinois cottage food opportunities.