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It’s time to rethink the disrupted US food system from the ground up – The Southern Maryland Chronicle
By: David R. Montgomery, Jennifer J. Otten, & Sarah M. Collier
The COVID-19 pandemic and resulting economic shutdowns haveseverely disruptedand spotlighted weaknesses in the U.S. food system. Farmers, food distributors and government agencies are working toreconfigure supply chainsso that food can get to where its needed. But there is a hidden, long-neglected dimension that should also be addressed as the nation rebuilds from the current crisis.
As scholars who study different aspects ofsoil,nutritionandfood systems, were concerned about a key vulnerability at the very foundation of the food system: soil. On farms and ranches across the U.S., the health of soil isseriously compromised today. Conventional farming practices have degraded it, and erosion has shorn away much of it.
Iowa has lost abouthalf the topsoilit had in 1850. Since they were first plowed, Americas farmland soils have lost abouthalf of their organic matter the dark, spongy decomposed plant and animal tissue that helps make them fertile.
The soil that produces our nations food supply is a weakened link slowly failing under ongoing strain. This breakdown isnt as dramatic as what happened in the 1930s during theDust Bowl, but it is just as worrying. Human history holds many examples of once-thriving agricultural regions around the world wherefailure to maintain soil healthdegraded entire regions far below their potential agricultural productivity, impoverishing the descendants of those who wrecked their land.
We believe there is an urgent need torebuild soil healthacross the U.S. This can help maintain harvests over the long run and lay a solid foundation for a more resilient food system. Investing in soil health will benefit environmental and human health in ways that arebecoming increasingly apparent and important.
Soil is the foundation of the U.S. food system. Fruits, vegetables, nuts and oils come directly from plants grown in soil. Meat, poultry, dairy products and many farmed fish come from animals that feed on plants. Wild-caught fish and shellfish, which provide a tiny fraction of the typical American diet, are virtually the only exception.
As populations around the globe ballooned over recent centuries, so did pressure to force more productivity out of every available acre. In many parts of the world, this led to farming practices that degraded soilfar beyond its natural fertility.
In the Southeastern U.S., for example, agricultural erosion stripped soil from hillsidesa hundred times fasterthan the natural rate of soil formation. Today farmers in the Piedmont, from Virginia to Alabama between the Atlantic coast and the Appalachian mountains, coax crops from poor subsoil rather than therich topsoil that early European settlers praised.
Researchers, government agencies and nonprofit groups recognize soil degradation as a national problem and have started to focus on rebuilding soil health. The U.S. Department of AgriculturesNatural Resource Conservation Servicehelps farmers improve thehealth and functionof their soils. Nongovernment organizations are recognizing the need torestore soil health on agricultural lands. And the 2018 farm bill directednew attention and funding to soil health programs.
Beyond growing food, soils support human, public and planetary health. Well before the current pandemic, experts in public health and nutrition recognized that modern agriculture wasfailing to sustainconsumers, the land and rural communities. This insight helped spur the emergence of a new multidisciplinary field, known asfood systems, that analyzes how food is produced and distributed.
But work in this field tends to focus on the environmental impacts of food production, with less attention to economic and social implications, or to links between farming practices, soil health and the nutritional quality of food. Many studies narrowly focus ongreenhouse gas emissions from agriculturewhen addressing soils and sustainability, without including the manyecological benefits that healthy soils provide.
To be sure, man-made climate change is a major long-term threat to human and planetary health. But soil health is just as critical in its own right. Human actions havealready harmed agricultural productivityin areas around the world. And when soil is degraded, food production systems areless able to weather future challengesthat we can expect in a changing climate.
The study of soil health can also have its own blind spots. Often agricultural research focuses solely on crop yields or the impact of individual conservation practices, such asadopting no-till plantingorplanting cover cropsto protect soil from erosion. Such analyses rarely consider linkages driven by dietary demand for specific foods and crops, or the effects of farming practices on thenutrient content of forage and cropsthat sustain livestock and humans.
Food systems experts have called for transforming food production to improve human health and make agriculture more sustainable. Some researchers have proposedspecific dietsthat they argue would accomplish both goals. But fully understanding connections between soil health and public health will require greater collaboration between those studying food systems, nutrition and how we treat the soil.
Now that COVID-19 has deconstructed much of the national food supply network, it would be a mistake to pour efforts into simply rebuilding a flawed system. Instead, we believe it is time to redesign the U.S. food system from the ground up, so that it can deliver both soil health and human health and be more resilient to future challenges.
What would it take to do this? The foundation of a revised system would be adoptingregenerative farming methodsthat integrate multiple soil-building practices, such as no-till, cover crops and diverse crop rotations to restore health to land. It would also take creating and expanding markets for more diverse crops, as well as expandingregenerative grazingand promoting reintegration of animal husbandry and crop production. And it would require investing in research into the linkages between farming practices, soil health and the nutritional quality of foods and what that all could mean for human health.
In sum, we think its time to rethink the food system, based on a recognition that providing healthy diets based on healthy soils is critical to achieving a healthier, more just, resilient and truly sustainable world.
David R. Montgomery, Professor of Earth and Space Sciences, University of Washington; Jennifer J. Otten, Associate Professor, Center for Public Health Nutrition, University of Washington, and Sarah M. Collier, Assistant Professor of Environmental and Occupational Health Sciences, University of Washington
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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It's time to rethink the disrupted US food system from the ground up - The Southern Maryland Chronicle
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