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Agriculture and Food

“The Double Edged Sword of Cover Crops: Balancing Crop Yields and Carbon Sequestration”

People have assumed climate change solutions that sequester carbon from the air into soils will also benefit crop yields. But a new study finds that most regenerative farming practices to build soil organic carbon — such as planting cover crops, leaving stems and leaves on the ground and not tilling — actually reduce yields in many situations.

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The notion that planting cover crops would not only benefit crop yields but also sequester carbon from the air into soils has been a widely-held assumption in the pursuit of climate change solutions. However, a recent study from Cornell University reveals that this approach may not be as effective as previously thought.

Researchers found that most regenerative farming practices aimed at building soil organic carbon, such as planting cover crops, leaving crop residues on the ground, and reducing tillage, actually reduce yields in many situations. The computer model analysis showed that global adoption of these practices to improve soil health can benefit either greenhouse gas mitigation or crop yields but rarely both.

The predictions will help farmers, policymakers, and sustainability professionals mix and match optimal management plans based on location, as different practices will work better or worse depending on local conditions. For instance, the model predicted that climate mitigation and improved yields had the best chance of occurring together when grains are planted, especially in soils with high clay content or limited nutrients.

“For the first time, we can have contextualized information about how farmers can choose the optimal mix of practices that meet their needs to maintain crop yields while also providing climate change mitigation,” said Dominic Woolf, senior research associate in the School of Integrative Plant Science at Cornell University.

Woolf is principal investigator of the project and senior author of the study published in Nature Climate Change. Shelby McClelland, a postdoctoral researcher at New York University’s Department of Environmental Studies, formerly in Woolf’s lab at Cornell, is the paper’s first author.

The researchers simulated various scenarios through the end of the century, including combinations of four common management practices: planting grass cover crops, planting legume cover crops, zero-tillage, and leaving crop residues in fields. The analysis showed that:

* Grass cover crops combined with no tilling led to the highest potential for limiting greenhouse gases but were the worst for crop yields.
* Legume cover crops with no tilling provided higher crop yields but close to 70% lower climate benefits.
* Reduced yields were found to be most likely in drier climates where cover crops compete for available water.

The study also highlighted that lowering nitrogen inputs into soil may help address nitrous oxide emissions, which are 273 times more potent as a greenhouse gas than CO2. The authors found that in order to maintain crop yields to feed a growing global population, the maximum greenhouse gas mitigation through 2100 would be about 85% lower than if yields were not considered and farming practices centered around optimal climate mitigation strategies.

The research was funded by various organizations, including the National Institute of Food and Agriculture, The Nature Conservancy, the Environmental Defense Fund, and others.

Agriculture and Food

Unlocking Nature’s Potential: Scientists Discover Key Molecule to Supercharge Plant Growth

Scientists have discovered that a molecule known for defending animal immune systems called itaconate also plays a powerful role in plants. Researchers showed that itaconate not only exists in plant cells but actively stimulates growth, such as making corn seedlings grow taller. This surprising crossover between plant and animal biology may unlock new, natural ways to boost agriculture and even improve human health.

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The article “Scientists find immune molecule that supercharges plant growth” has been rewritten to provide clarity, structure, and style while maintaining its core ideas. The rewritten version is as follows:

Unlocking Nature’s Potential: Scientists Discover Key Molecule to Supercharge Plant Growth

For years, researchers have known about a molecule called itaconate that plays a vital role in the human immune system. However, its presence and functions in plants remained largely unexplored – until now. Biologists at the University of California San Diego have conducted the first comprehensive study on itaconate’s functions in plants, revealing its significant role in stimulating plant growth.

“We found that itaconate is made in plants, particularly in growing cells,” said Jazz Dickinson, a senior author of the study and an assistant professor in the Department of Cell and Developmental Biology. “Watering maize (corn) plants with itaconate made seedlings grow taller, which was exciting and encouraged us to investigate this metabolite further and understand how it interacts with plant proteins.”

The researchers used chemical imaging and measurement techniques to confirm that plants produce itaconate. They also discovered that itaconate plays multiple key roles in plant physiology, including involvement in primary metabolism and oxygen-related stress response.

Optimizing the natural benefits of itaconate could be crucial for safely maximizing crop growth to support growing global populations. “This discovery could lead to nature-inspired solutions to improve the growth of crops, like corn,” said Dickinson. “We also hope that developing a better understanding of the connections between plant and animal biology will reveal new insights that can help both plant and human health.”

The study, supported in part by funding from the National Science Foundation and the National Institutes of Health, was published in the journal Science Advances on June 6, 2025. The findings have exciting implications for improving crop growth using nature-inspired solutions, while also offering fresh information for understanding the molecule’s role in human development and growth.

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Agriculture and Food

Standardizing Psychedelic Research: A Breakthrough in Understanding the True Potential of Mind-Altering Drugs

As psychedelics gain traction as potential treatments for mental health disorders, an international study stands to improve the rigor and reliability of clinical research.

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Standardizing Psychedelic Research: A Breakthrough in Understanding the True Potential of Mind-Altering Drugs

The use of psychedelics as potential treatments for mental health disorders has gained significant traction in recent years. However, a critical flaw in psychedelic clinical trials has hindered their progress – the failure to properly account for how a person’s mindset and surroundings influence the effects of these substances.

A group of international researchers from McGill University, Imperial College London, and the University of Exeter have tackled this issue by developing a set of guidelines to standardize psychedelic clinical trials. The Reporting of Setting in Psychedelic Clinical Trials (ReSPCT) guidelines are a 30-item checklist that represents the first global agreement on which psychosocial factors have the greatest impact on a psychedelic experience.

“For decades, we’ve known that psychedelics don’t work in isolation,” said co-lead author Chloé Pronovost-Morgan. “The person’s mindset, the therapy room, even the music playing all influence outcomes.” This approach challenges the traditional way psychoactive drugs are typically studied, where scientists try to control or eliminate outside variables to isolate a drug’s effects.

These guidelines recognize that context is crucial and should be studied directly. By offering a standard framework for evaluating and reporting these variables, the ReSPCT guidelines aim to make trial outcomes more consistent and comparable across studies.

Having clear guidelines for contextual considerations is essential to understand the effects of psychedelics and how they work differently from other psychiatric medications,” said co-senior author Leor Roseman. “Our guidelines will also help in replicating results and understanding the true therapeutic potential of psychedelics.”

The lack of standards has had consequences beyond the research lab, Pronovost-Morgan explained. The U.S. Food and Drug Administration recently rejected MDMA-assisted therapy for post-traumatic stress disorder, citing inconsistent reporting across trials as a key reason for the decision.

“There is immense public interest in psychedelic therapies, particularly for individuals suffering from debilitating mental health conditions like PTSD, depression and anxiety, which have not responded to existing treatments,” said co-senior author Kyle Greenway. “Our guidelines offer a new gold standard for psychedelic research, helping bring these treatments to those who need them most.”

The research team is organizing a three-day workshop in October, funded by McGill’s Healthy Brains, Healthy Lives initiative, where leading experts in psychedelics and neuroscience will discuss how the guidelines can be integrated into research and clinical practice.

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Agriculture and Food

Harnessing the Power of Solar Arrays for Grassland Conservation

New research shows that the presence of solar panels in Colorado’s grasslands may reduce water stress, improve soil moisture levels and — particularly during dry years — increase plant growth by about 20% or more compared to open fields.

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The article highlights groundbreaking research conducted by Colorado State University and Cornell University that demonstrates how solar arrays can aid grasslands during drought. The study, published in Environmental Research Letters, reveals that photovoltaic (PV) arrays located in grassland ecosystems can reduce water stress, improve soil moisture levels, and increase plant growth by up to 20% or more compared to open fields.

Researchers found that plants beneath and around the solar systems benefited from partial shading and additional water that collects on panels. During a dry year, grass growth on the east side of panels was significantly higher than in neighboring open sites. This positive response was reduced during wet and normal years but still demonstrated the potential benefits of co-locating solar power infrastructure with ecosystem preservation.

The study’s lead author, Matthew Sturchio, emphasizes that small changes in array design, configuration, and management could unlock untapped benefits, particularly those related to water use. The researchers are now exploring ways to optimize solar array placement and design to maximize the benefits for grassland ecosystems.

Alan Knapp, a University Distinguished Professor at CSU, notes that their research has significant implications for restoring grassland ecosystems in arid and semi-arid regions. He suggests that building solar facilities in areas where they can benefit from strategic placement is an obvious win-win. The team plans to investigate the functional underpinnings of this idea at a newly constructed research facility.

This pioneering study showcases the potential for solar arrays to support grassland conservation, especially during drought-prone seasons. As researchers continue to explore and refine this concept, it may provide valuable insights into creating more resilient and sustainable ecosystems for generations to come.

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