Researchers found that genetically engineered corn and soybeans were associated not only with higher average yields, but also with less year-to-year yield volatility and some protection against adverse climate effects. The technology also appeared to slow some of the northward movement in U.S. crop production associated with changing climate conditions.
That matters because crop resilience is about much more than getting through one difficult growing season. A more dependable harvest can help farmers plan with greater confidence, reduce catastrophic losses, stabilize income, and create more room to reinvest in things like better irrigation, precision agriculture, soil testing, improved machinery, and healthier soils (ie- a healthier world).

In other words, biotechnology may be doing more than helping farmers produce bigger harvests. It may be helping make agriculture more dependable. And when you are feeding millions of people, dependability matters.
Some genetically engineered traits can also reduce certain insecticide applications, support reduced-tillage systems, and help farmers produce more food on existing farmland.
Taken together, these benefits can create a larger ripple effect: More resilient crops, more stable farms, more efficient use of resources, greener practices and a more reliable food supply.
We’ve Been Talking About GMOs for a Long Time
At Dirt to Dinner, this is hardly our first conversation about crop biotechnology.
We have explained how GMOs work, explored their potential to improve yields and reduce agricultural inputs in our 5 Benefits of GMOs, and broken down the often-confusing difference between GMOs and CRISPR. More recently, the story has moved beyond traditional genetically engineered crops.
We looked at how biotechnology could make everyday foods more nutritious in Engineering Nutrition: The Crops Changing Public Health, including lettuce with more beta-carotene and vitamin C and tomatoes designed to provide more vitamin D. And earlier this year, we explored whether gene-editing technology could rescue crops facing disease, drought, heat, food-safety challenges, and other threats.
Those stories largely asked a forward-looking question: What might biotechnology allow us to do?
This new research asks something different:
After decades of farmers actually using genetically engineered seeds, what can we now see happened in the fields?
A 40-Year Experiment Hidden in America’s Farmland
Imagine trying to test whether a technology helps agriculture cope with changing weather. Ideally, you might plant thousands of identical farms across the country. Half would use genetically engineered seeds, half would not. You would expose them to the same heat, rainfall, insects, soil conditions, and management practices for decades, then compare the results. Of course, no such experiment exists.
Instead, researchers Caroline Yifan Dong, Chengcheng Fei, Bruce McCarl, David Zilberman, and Xingguo Wang used something much larger: America’s actual agricultural history.
Their new study in Nature Climate Change analyzed crop production, climate, land use, and genetically engineered crop adoption across the United States from 1978 through 2020. That time span matters.
Commercial adoption of genetically engineered crops accelerated in the 1990s. According to the USDA Economic Research Service, today’s major GE crops include corn, soybeans, and cotton, particularly varieties engineered for insect resistance, herbicide tolerance, or both.
That gave researchers years of agricultural data before widespread adoption and decades of experience afterward. They then asked several questions:
- Did yields change?
- Did they become more or less volatile?
- Did changing temperatures and rainfall affect GE crops differently?
- And did biotechnology influence where farmers could continue successfully growing these crops?

The researchers concluded that GE adoption was “broadly associated with yield benefits,” with higher yields and lower yield volatility in corn and soybeans, partial buffering of damaging climate effects, and more modest benefits in cotton. But the word volatility may be the most important part of that sentence.
Bigger Harvests Get Attention. Reliable Harvests Matter, Too.
We tend to measure agricultural progress by asking how much more we can grow. If an acre of farmland once produced 150 bushels of corn and now produces 180, the improvement is easy to see.
But imagine two farmers whose fields both average 180 bushels over several years:
- Farmer A harvests roughly 175, 182, 178, 184, and 181 bushels – planning ahead pays off in consistent yield
- Farmer B harvests 220 one year, then 135, 210, 145, and 190 – this farmer is riding an agricultural roller coaster
Their averages may eventually look similar, but their businesses do not.
Farmers have to buy seed, fertilizer, equipment, fuel, and crop-protection products months before harvest. Grain elevators need to anticipate storage. Livestock producers depend on crops to feed their animals. Food manufacturers contract for ingredients. Exporters negotiate shipments. A wildly unpredictable harvest can ripple far beyond the field where the crop was grown.
This is what makes the new study interesting. For corn and soybeans, GE adoption was associated not just with higher production, but lower year-to-year variability in production. Think of resilience as suspension on a car. Good suspension does not make the potholes disappear. It reduces how violently the car reacts when it hits them.[SL1]
Likewise, a resilient crop does not make drought, excessive heat, insects, or heavy rainfall disappear. It may simply help soften the blow. And softening the blow has consequences. A farmer who repeatedly loses large portions of a crop may have little financial flexibility beyond covering the next season’s bills. A farmer with more dependable yields has a better chance of investing in the next improvement.
On a farm, those options might include improved irrigation, precision nutrient application, drainage, newer equipment, cover crops, better storage, or technology that can make the next crop healthier and more efficient. That is why resilience can compound over time.
Resilience Can Also Mean Doing More With Less
The environmental side of this story matters, too. Not every GMO reduces every crop input, and the benefits vary by crop, trait, geography, and management system. But certain genetically engineered traits have delivered measurable efficiencies. Insect-resistant crops, for example, can reduce the need for some insecticide applications because the plant itself is protected against specific pests.
Herbicide-tolerant systems have, in some cases, helped support reduced-tillage or no-till practices. That can mean fewer tractor passes across a field. Fewer passes can mean less fuel use. Less tillage can mean less soil disturbance. And if farmers can produce more food reliably on the same acreage, there may be less pressure to compensate for poor yields by bringing additional land into production.
That last point is especially important. A farm’s environmental footprint is not just about how many pounds of fertilizer, pesticide, or fuel it uses. It is also about how much food is produced from those resources. If one acre produces more food with the same or fewer inputs, the environmental cost per bushel or pound of food can fall.
That is a much more useful way to think about efficiency. The goal is not simply “use less.” It is using resources more productively.
Here’s the Surprising Part: Most Were Not “Climate Crops”
It would be easy to assume these crops were genetically engineered specifically to survive climate change. Most were not.
The major first generation of genetically engineered crops planted across American farmland primarily offered farmers traits such as insect resistance and herbicide tolerance. Bt corn, for example, is engineered to defend itself against certain destructive insects. Herbicide-tolerant crops give farmers additional tools for controlling weeds competing with crops for sunlight, nutrients, space, and water.
Neither trait sounds like a weather technology. But a corn plant does not experience stress one problem at a time.
Picture trying to run a marathon on a very hot day. Now imagine doing it while fighting the flu and carrying a heavy backpack. Removing either of those additional burdens will not cool the weather, but it may make coping with the heat a little easier.
Plants face similar stacks of stress. During drought or excessive heat, a plant already has limited resources. Add significant weed competition or insect damage, and those resources are stretched even further.
The new research suggests that the combination of GE crop development and the farming practices surrounding it may have helped buffer some climate-related stress. That does not mean every GE trait automatically makes a plant climate-resistant. It means biotechnology may contribute to resilience even when “climate resilience” was not the original trait printed on the seed bag.
America’s Farm Map Is Moving
There was another finding that may be even harder to picture from the grocery aisle: where America grows crops is changing.
Farmers do not simply decide where corn, cotton, or soybeans should grow based on tradition. Agricultural geography is influenced by growing-season temperatures, rainfall, frost dates, soils, pests, water availability, and economics. When those conditions change, crop production can move.
Over the study period, researchers observed northward shifts in cultivation. Previous research has shown that climate is one contributor to these geographic changes. But when the researchers modeled what U.S. agriculture might have looked like without genetically engineered crop adoption, they found something intriguing: GE adoption appeared to dampen some of that climate-driven northward movement.
In plain English, biotechnology may have helped some farmers maintain production in regions where changing conditions otherwise would have placed greater pressure on cultivation to move elsewhere.
That does not mean the Corn Belt is staying frozen on a map forever. It suggests technology may give farmers more room to adapt where they already are. And there are consequences when agriculture has to move. New crop acreage can require different infrastructure, transportation networks, storage, processing capacity, irrigation, and potentially conversion of other land to agricultural production. Keeping existing productive farmland productive can therefore matter well beyond an individual farm.
Why Does This Matter to Someone Buying Groceries?
Most of us will never choose corn seed or worry about soybean yields. We choose tortilla chips, cereal, chicken breasts, cooking oil, milk, eggs, and hundreds of other foods connected directly or indirectly to American agriculture. Corn and soybeans are major livestock feed crops, so what happens in those fields does not necessarily stay in the produce or grain aisle.

When harvests become less reliable, the effects can travel through storage facilities, feed markets, transportation networks, food manufacturers, livestock farms, and eventually grocery supply chains.

None of this means GM crops guarantee cheaper groceries. Food prices are influenced by labor, transportation, energy, weather, trade, processing, packaging, and global demand.But a food system built on more reliable harvests starts from a stronger position than one built on unpredictable ones. For consumers, “yield stability” sounds like agricultural jargon.
At its simplest, it means something much more familiar:
Will there still be enough to go around after a difficult growing season? And the evidence suggests the next chapter of the GMO conversation may be less about producing the biggest harvest possible under perfect conditions and more about something arguably just as important: producing food reliably when conditions are anything but perfect.
Genetically engineered crops have long been evaluated for their safety, productivity, environmental impact, and ability to protect plants from insects and weeds. New long-term research adds another consideration: stability. Across four decades of U.S. agriculture, GE adoption was associated with higher yields and lower yield volatility in corn and soybeans, some buffering against adverse climate effects, and less climate-driven movement of crop production northward. Those benefits can extend beyond the plant itself.
More reliable crops can support more stable farm income, encourage reinvestment in technology and soil health, improve resource efficiency, reduce certain inputs in some systems, lessen pressure on additional farmland, and strengthen the reliability of the broader food supply. Biotechnology will not solve every agricultural challenge.




The researchers found significant improvements in intelligence, attention, concentration, and memory, although they did not find sufficient evidence of improved school achievement. Effects varied among studies and should not be interpreted to mean that iron supplements enhance cognition in every child.
A struggling student does not announce, “My iron stores are low,” or “My diet lacks sufficient variety.” Instead, the difficulty may sound like: “I’m tired.” “I can’t think.” “I forgot.” “This is too hard.” “I don’t care.”
In 1960, the U.S. population was 179 million people, each eating about 63 pounds of beef per year. Today, 









Meat and meat packaging exports from the United States to Europe peaked in 2008 at about $2.8 billion.
Comments such as “positive” and “good, if not perfect” were typical. “The best we could get under very difficult circumstances,” said EU Trade Commissioner Maros Sefcovic.

Double- and triple-digit inflation spiraled ever-upward. Market forces were non-existent and government control squeezed capitalism into nothing.

Agriculture accounts for only 5 percent of the country’s entire Gross Domestic Product (GDP). About 



76 adults with low vitamin D consume tomato soup daily for three weeks, each serving made from tomatoes edited to accumulate provitamin D3, which converts in the body to vitamin D3.







These technologies don’t just reduce environmental harm—they also improve operational efficiency.

Eligibility and the amount of assistance from SNAP are based on gross and net monthly income. In most cases, 












Mostly I look for sales. If it’s a good deal, that’s what we eat.
What do you think? Of course they are going to keep going up. Nothing I can do about that.
We’ll go out on weekends now and then, but not during the week. And we try to leave the kids home when we do. That saves us a lot of money.





A local supermarket worker described the retail situation in simple terms: “Eggs come in on Friday’s truck. By Monday, they are pretty much gone.”



As for the salad…



My part of North Carolina was hit especially hard, with epic flooding and devastation that simply wiped away many of the small towns here and left cities like Asheville reeling from destruction almost beyond description. The photo on the right shows Helene’s impact on my hometown.



You wonder: are your children charging too much? So you go back and encourage them to drop their price to $1.00, knowing that at least they should make $25.00 for the day. This will take most of the summer, but an iPhone is still in their future. Life is good.






We’re still without our long-overdue
























The continuation of the Black Sea Grain Initiative that opened the door for resumed exports also must be renewed this spring.
China’s top diplomat paid Putin a visit in February which sent nervous energy throughout the western world. National leaders worry that support from China and more aggressive action by Russia could expand the conflict still further, prompting more and more retaliatory response from the West.
So why are so many people still holding their breath about the ongoing conflict, and its potential threat to food security? The answer is simple.
News of the courage and resiliency of the Ukraine producer and the entire national agricultural sector has been inspirational.

Food security concerns were confirmed in March 2022 during the 
Their 



In response to the dire situation, national leaders responded by negotiating the Black Sea Grain Initiative, which allowed a resumption of shipments under controlled conditions.
Prior to the recent Ukraine announcement, data from the United Nations already had shown the progress being made. UN estimated that more than 10.4 million tons of grains and other foods have shipped from Ukraine ports since the Initiative was signed in July.


The Nature Conservancy is pleased to present its Global Regenerative Food Systems Director, 
Supporting producers to mulch-till the residue instead of burning helps to clear the air and keeps people healthy. This also constitutes a regenerative ag practice which, in turn, will improve soil health, nutrient content and water management — all which lead to better outcomes for people and nature.

We’re committed to a system based on comparative advantage, in which all nations seek to exploit their natural advantages to supply the world with the commodities and food products they produce most efficiently.








To begin, Ukraine offers an abundance of natural resources, including agricultural products such as corn and oilseeds, minerals and other staples of living. Its central location between European and Asian markets makes it a natural source of supply in both directions. Its river system and access to warm-water ports promise steady and reliable delivery.




Drought affects both crop and livestock production, obviously. Dealing with the problem poses different sets of problems and issues for both.


We elected to continue that work by seeking current price information for the same 15-item food basket, but with data from the Northeast, mid-Atlantic, deep South, upper Midwest, Gulf Coast, Mountain region, and West Coast.










In Africa, where nutrition and food scarcity are real issues, studies have been done but the correlation is not always strong. The chart below shows the inconsistencies of zinc in the soil versus in the corn, cowpea, millet, and sorghum.
As our population grows, we are faced with an enormous challenge of meeting the increased demand for overall protein.




In
Farmers in Burkina Faso are calling on the government to fast-track the approvals for Bt cowpea in response to COVID-19. Burkina Faso farmer Wiledio Naboho said COVID-19 has negatively impacted production this year and farmers are counting on GM crops to help them increase productivity.



As we look to the future of what life will look like after COVID-19, we can’t wait to get back to our favorite corner bistro to get our hands on that famous burger or specialty dessert that we have been missing for months.
Helping to mobilize the community is a simple, effective way to show your support for restaurants outside of donations. If you are financially struggling, this is a costless way to lend a hand! Something you can do right now is to take a look at the handles we have included above in our Relief Funds section and consider following these organizations. That way, you can show your support by raising awareness and stay up-to-date with initiatives and efforts they are working on.



























































