The LTAR Network

We are a growing research network focused on developing national strategies for improved agricultural production. Our goal is to improve environmental quality and the well-being of farming communities while achieving increased agricultural production.

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


2024 LTAR Annual Science Meeting at WGEW

The 2024 Annual LTAR Meeting will be hosted by the Walnut Gulch Experimental Watershed site at Tombstone, AZ (the WGEW ...

2022 LTAR Annual Meeting at CAF

The 2022 Annual LTAR Meeting will be hosted by the R. J. Cook Agronomy Farm (the CAF LTAR site). Register ...

2021 LTAR Annual Meeting at LMRB

The 2021 Annual LTAR Meeting will take place virtually and will be hosted by the USDA ARS National Sedimentation Laboratory ...

NSF NEON Workshop Announcement

Complex Landscapes at Scale: Integrating our Understanding of Managed and Unmanaged Lands at Regional to Continental Scales Growing societal pressure ...

2020 LTAR Annual Meeting at KBS

The 2020 Annual LTAR Meeting will take place virtually and will be hosted by the Kellogg Biological Station Location: Virtually at ...


LTAR Tweets ( @USLTAR )




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.