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Contact Us

We invite you to suggest changes to the Thesaurus and Glossary.

General inquiries may be sent to the Thesaurus Staff.

Sujata Suri, Ph.D
NAL Thesaurus Coordinator
Phone: (301) 504-5058

Jennifer Woodward-Greene, Ph.D
Branch Chief
Indexing and Informatics Branch
National Agricultural Library
10301 Baltimore Ave.
Beltsville, MD 20705

Wildland Planning Glossary

Welcome to the Wildland Planning Glossary, an online vocabulary tool of 1400 terms useful in wildland and natural resources planning.

The glossary, published in 1976 and reprinted in 2004, remains the most comprehensive glossary of natural resources planning terminology used by resource specialists and planners around the world.

Silvics of North America Glossary

Welcome to the Silvics of North America Glossary, an online vocabulary tool of 306 terms related to silviculture.

The glossary is part of the larger work, Silvics of North America, which describes the silvicultural characteristics of about 200 conifer and hardwood trees in the United States, Alaska, Hawaii and Puerto Rico. Published by the Forest Service, USDA, it serves as a useful reference and teaching tool for researchers, educators, and practicing foresters both within the United States and abroad.

IRRI Rice Thesaurus

Welcome to the International Rice Research Institute (IRRI) Rice Thesaurus, an online vocabulary tool of rice terminology.

The thesaurus is a joint project of the IRRI Library and Documentation Service (LDS) and the Communication and Publications Services (CPS). It aims to make available standard terms used in rice production and ultimately, to facilitate the search and retrieval of rice information.

Download Files

This page contains SKOS variants for downloading the 2022 edition of the Thesaurus. These files were updated as of July 28, 2022.


Thesaurus (2022 Edition)
File File Type Language


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Search Tips for the Thesaurus

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Terms are displayed in alphabetical order. Cross references (Use terms) for NAL Agricultural Thesaurus terms appear in italics. Click on terms to show their complete records. 

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With this selection, the results page displays an alphabetical list of terms that fit the search criteria.

This is the results display for a search for Terms which contain this character string... "artificial":