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 )

Job announcement: Support Scientist (Soil Science) Vacancy – Akron, CO

Job announcement: Biologist (Computational Bioinformatics) – Lincoln, NE

The LTER Network seeks #synthesis proposals that use LTER (and other) data. Got an idea for combining @USLTER data with @NEON_sci @Estuaries4Life @CZCNet @oceanobserv @ForestGEO @USLTAR or other long term data assets? We want to hear about it.

New in JEQ! Envisioning the manureshed: Toward comprehensive integration of modern crop and animal production #OpenAccess @USDA_ARS @PSUEngineering @AAC_Canada @UF_IFAS_RCREC @USLTAR

ARS Hosts 3-Part Livestock Heat Stress Webinar Series! ➡️ Jul 27 – Aug 3 – Aug 10
Hot temps can significantly affect animal health & well-being & decrease production. Scientists present research to help alleviate the impact of heat stress in livestock. ➡️

🥳🌷 Happy 10th anniversary @USLTAR 🌽🐄🚜🔬🛰️📊📈 a big honor to be part of this great research family 🌷 Thank you for all your great work in this first decade, and for setting up the ground for a more sustainable future for Ag and Rangelands. Let's keep it up! 👩🏻‍🌾🧑‍🌾

𝗔𝗥𝗦 𝗙𝗲𝗮𝘁𝘂𝗿𝗲𝗱 𝗣𝗵𝗼𝘁𝗼: ARS rangeland scientist Pat Clark is managing a research project that uses livestock to create firebreaks through targeted grazing. Learn more

ARS scientists are working to solve some of the problems w/ the Chesapeake Bay by looking at ways to treat pollutants through vegetative buffers along streams, changes in farm management & consumer awareness of how to minimize pollutants. Read #SaveTheBay

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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.