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 )

#NASS and @USDA_ARS has released the 2022 Cropland Data Layer on the CroplandCROS web portal at The CDL is an annual 30-meter, crop-specific land cover classification begun in 1997 and covering the continental United States since 2008.

Job Announcement: Postdoctoral Research Agronomist/Ecologist Position – Mandan, ND #postdocjobs #postdocposition

What is a manureshed? Check out JEQ's special section to learn more!

ARS makes managing cropland easier for growers worldwide. Learn how Management Zone Analyst, a software developed by ARS, makes managing cropland easier for growers worldwide.

Job announcement: Post-doctoral associate in eco-hydrologic modeling, remotely sensed data, and machine learning techniques, Columbia, MO
#postdoc #science #job

LTAR scientists gathered at the LTAR Integrated Meeting at @archboldstation to collaborate on joint research products addressing US #sustainableAgriculture #sustainableAg with #remoteSensing and #HumanDimensions @USDA_ARS @USDA

Recovering manure’s fertilizer value for a secure U.S. agriculture

Job announcement: Research Hydrologist Postdoc - USDA-ARS Southwest Watershed Research Center, Tucson, AZ

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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.