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Title: Lignin staining ...a limited success in identifying koa growth rings

Author: Wick, Herbert L.;

Date: 1970

Source: Res. Note PSW-RN-205. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

Publication Series: Research Note (RN)

Description: Among the lignin stains tested in trying to identify growth rings in koa (Acacia koa Gray), phloroglucinol was the most effective. The light colored sapwood of mature trees stained readily, with growth rings apparent. But staining failed to emphasize rings in the dark colored heartwood. Growth rings were not apparent on samples from young fast growing, sapling size trees. In none of the samples could growth rings be used to estimate tree age or periodic growth.

Keywords: Acacia koa, age determination, ring count, lignin stainin, phlornglucinol

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.

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Citation:


Wick, Herbert L. 1970. Lignin staining ...a limited success in identifying koa growth rings. Res. Note PSW-RN-205. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

 


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