Date of Award:

1970

Document Type:

Thesis

Degree Name:

Master of Science (MS)

Department:

Wildland Resources

Department name when degree awarded

Forest Science

Advisor/Chair:

John D. Schultz

Abstract

Biomass of roots in the top 6 inches of soil profile was measured . This weight was then used in a stepwise multiple regression to test correlations between root biomass and above ground merisurational parameters.

Total biomass of all roots was 9822 ± 2810 pounds per acre oven dry. Spruce roots weighed 4417 ± 997 pounds per acre; of this spruce roots less than 0.125 inch diameter weighed 2023 ± 347 pounds per acre and biomass of spruce roots greater than 0.125 inch diameter was 2394 ± 8S3 pounds per acre. Total fir roots weighed Sl56 ± 2687 pounds per acre; of this roots less than 0.125 inch totaled 869 ± 181 pounds per acre and biomass of fir roots greater than 0.125 inch diameter was 4287 ± 2653 pounds per acre.

Low r2 (0.11 to 0 .17) values were found and the parameters which showed the greatest predictive value were (dbh)2, dbh, basal area, (basal area)2, and height.

The sampling design involved the pairing of trees over 4 inches diameter. Point density expressed as basal area was not useful in relating to root biomass with this sampling design.

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