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 )

New publication: Gridded 20-year climate parameterization of Africa and South America for a stochastic weather generator (CLIGEN)

Water Wisdom! What new approaches is ARS taking to meet emerging challenges to water availability? Teferi Tsegaye, National Program Leader for Water Availability and Watershed Management explains in this ARS Under the Microscope interview

Job announcement: Supervisory Research Microbiologist/Ecologist/Soil Scientist, Ames, IA

Webinar: Addressing Water Quality Outcomes Through Nutrient and Water Management

Want to learn more about SMART nutrient and water management strategies? The NRCS Conservation Outcomes webinar with Dr. Kevin King of @USDA_ARS can help! Access the webinar recording here 👉

Kudos! The ARS Southwest Watershed Research Center is the recipient of @nature_org’s 2022 Morris K. Udall Award for Outstanding Conservation Achievement for their significant contributions and for demonstrating sincere and sustained commitment to conservation in AZ.

Water Wisdom: Farmers Must Prepare for a Drier Future

ARS scientists have found that intercropping, growing a healthy mix of plants, can be an effective tactic for increasing the productivity and sustainability of agriculture.

#DiscoverARS | #SustainabilityDay

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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.