Agriculture

In a world where increasing demands for food security and energy strain existing resources, scientists are looking for new ways to maximize both. One potential option, agrivoltaics, integrates solar photovoltaics with crops. A new study examines the agricultural and economic trade-offs that come with installing solar arrays on working farms across the Midwest.

Few pests eat away at farm profitability as much as soybean cyst nematode (SCN). Causing at least $1.5 billion in yield losses annually, it’s soybean’s single biggest threat. Unfortunately, soybean’s most effective tool, genetic resistance, is starting to fail. 

A new accounting of nitrogen pollution in the Mississippi-Atchafalaya River Basin (MARB) reveals a significant decline in recent decades, suggesting positive momentum for water quality goals in local watersheds and the Gulf. Surprisingly, the University of Illinois Urbana-Champaign-led study doesn’t credit the change to reduced fertilizer application, but instead to cleaner air and more efficient nitrogen uptake by modern corn hybrids. 

A lot has changed on the University of Illinois Urbana-Champaign campus since its founding in 1867, but a storied plot of land near the south quad has been preserved nearly intact for a century and a half. The Morrow Plots, famed in song and story, represent the oldest continuously running agricultural experiment in North America, and are the second oldest in the world. And this year, they turn 150.  

The soil microbiome is critical for the ecosystem, and agricultural practices that promote microbial diversity can support plant health and help protect against pests. But it is unclear which practices are most beneficial, and what motivates farmers to choose them.

As a recent communications graduate, Lia Basden missed getting her hands dirty and making things grow. “My parents have a big garden and chickens,” she said. “I missed touching dirt.” That’s why she applied to the University of Illinois Urbana-Champaign’s Small Farm Certificate Program. Last semester, after eight months of hard work, she’s the program’s inaugural graduate.

Corn bred with genes from wild relatives can reshape soil microbial communities and reduce nitrogen loss — with no yield reduction — according to new research from the University of Illinois Urbana-Champaign. The advancement marks the first time corn’s genetic makeup has been linked with inhibition of nitrifying and denitrifying bacteria, the microbes responsible for turning fertilizer nitrogen into forms that pollute water and contribute to climate change.   

Antibiotic resistance in human and animal health is on the forefront of public debate, but it’s a less well-known issue in plant agriculture. However, antibiotics are important tools in fruit production, and their efficacy hinges on avoiding resistance in disease-causing bacteria. 

Scientists at the University of Illinois Urbana-Champaign can now differentiate between human-derived and hydrological contributions of riverine nitrogen pollution in the Upper Mississippi River Basin. The advancement, published in Environmental Science and Technology, sets the stage for more nuanced policy and management of nitrate and nitrite, the nutrients that degrade drinking water quality and cause oxygen-starved “dead zones” in the Gulf each year.

University of Illinois Urbana-Champaign corn breeders know profitability is about more than yield. By tweaking kernel composition, they can tailor corn for lucrative biotech applications, industrial products, overseas markets, and more. But to efficiently unlock these valuable traits, breeders must first understand their genetic underpinnings.