Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (378 KB)

Title: Equilibrium relative humidity as a tool to monitor seed moisture

Author: Karrfalt, Robert P.;

Date: 2010

Source: In: Riley, L. E.; Pinto, J. R.; Dumroese, R. K., tech. cords. National Proceedings: Forest and Conservation Nursery Associations-2009. Proc. RMRS-P-62. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 45-47.

Publication Series: Proceedings (P)

   Note: This article is part of a larger document. View the larger document

Description: The importance of seed moisture in maintaining high seed viability is well known. The seed storage chapters in the Tropical Tree Seed Manual (Hong and Ellis 2003) and the Woody Plant Seed Manual (Bonner 2008a) give a detailed discussion and many references on this point. Working with seeds in an operational setting requires a test of seed moisture status. It is necessary to know if the seeds are high in moisture or if they are dry enough to store without losing germination. Seed moisture testing was originally done by drying seeds for about 16 hours in a hot oven to drive off the water in the seeds. The moisture content was then determined indirectly by weight loss. For example, if there is a 1 g weight decrease after drying 10 g of seeds, the moisture content is assumed to be 10%. The test is destructive because the high temperature required to drive off the moisture will kill seeds.

Keywords: hygrometer, seed storage, seed testing

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to rmrspubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Karrfalt, Robert P. 2010. Equilibrium relative humidity as a tool to monitor seed moisture. In: Riley, L. E.; Pinto, J. R.; Dumroese, R. K., tech. cords. National Proceedings: Forest and Conservation Nursery Associations-2009. Proc. RMRS-P-62. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 45-47.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.