The Long-Term Agroecosystem Research (LTAR) Network

We are a growing research network focused on developing national strategies that respond to the agricultural challenges of the 21th Century: food security and climate change.

The LTAR Network is a partnership among 18 premier long-term research sites across the United States.

The Network has a multifaceted focus on satisfying increasing demand for agricultural commodities, protecting the quality of the environment, and enhancing the quality of life in rural areas and the Nation as a whole.

Who We Are

The LTAR Network is a growing group of researchers focused on finding solutions that maintain or increase agricultural productivity, environmental quality, and people well-being in spite of pressures such as climate change.  Read more

Our Research Approach

The LTAR network combines strategic research projects with common measurements on multiple agroecosystems (croplands, rangelands, and pasturelands) and develops new technologies to address local and national challenges and opportunities.
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Data Access

LTAR scientists are responsible for managing a rich legacy of data spanning over seventy years for many sites. Collectively, it is estimated LTAR manages [200+ terabytes] of data.
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The 18 LTAR Network Sites

The 18 LTAR Network Sites collaborate in coordinated strategic research that leverages a rich legacy of research and data collection. Read more

(Click dots to open LTAR site page)

LTAR Network Tweets ( @USLTAR )

Congrats! Dr. Michael Cosh receives 2022 Soil Moisture Community Leadership Award from @DroughtGov for demonstrating extraordinary commitment to building the soil moisture community of practice and delivering soil moisture-related products and services to support the public good.

USDA investing up to $2.8 billion in 70 selected projects under the first pool of the Partnerships for Climate-Smart Commodities. Watch @SecVilsack's live remarks ➡️

ARS Scientists Transform an Overlooked Weed into a Stunning Success

The 2022 Census of Agriculture is coming this Fall. By responding and being represented in these widely used data, producers have a voice in the decisions that will shape the future of American agriculture. #AgCensus

We are committed to finding solutions to agricultural problems that affect American's from field to table. Learn about our research accomplishments in our 2021 ARS Annual Report on Science.

Job announcement: Microbiologist/ Soil Scientist/ Ecologist in Beltsville, MD

ARS looks to address issues of environmental justice and climate change through the Justice40 Initiative. Read more about it here

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The USDA Agricultural Research Service (ARS) Long-Term Agroecosystem Research network consists of 18 Federal and university agricultural research sites with an average of over 50 years of history. The goal of this research network is to ensure sustained crop and livestock production and ecosystem services from agroecosystems, and to forecast and verify the effects of environmental trends, public policies, and emerging technologies.