Life Sciences Commons^™

The Wood And Bark Biomass And Production Of Populus Tremuloides, Abies Lasiocarpa And Picea Engelmannii In Northern Utah, George L. Zimmerman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Thirty-two engelmann spruce (Picea engelmannii) ranging in d.b.h. from 9.4 to 84.6 cm, twenty subalpine fir (Abies lasiocarpa) with d.b.h.'s from 8.1 to 58.8 cm, and twenty aspen (Populus tremuloides) ranging in d.b.h. from 4.5 to 48.2 cm. were destructively sampled in Northern Utah to construct wood and bark biomass and production prediction equations for above and below ground parts. These prediction equations were then applied to stand table data from 20 x 25 meter plots representing a sere that changes from subalpine meadow to aspen to fir to a 'climax' stand of spruce. …

The Influence Of Climate On Biomass And Mineralomass Of A Crested Wheatgrass Community In Northern Utah, Randall S. Shinn

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Aboveground biomass, litter biomass and root biomass of a crested wheatrgrass (Agropyron desertorum [Fisch.] Schult.) dominated community were inventoried in the fall of 1971, 1972, and 1973. In addition, energy, nitrogen, fats and ash determinations were made on the materials collected in 1972 and 1973.

The sampling methods used generated data sufficiently precise to detect significant differences (α = .10) among biomass components among years. The chemical contents of the components were similar in the fall of 1972 and the fall of 1973 despite the large differences in growing season precipitation.

A simple linear regression formula was generated from …

A Study Of Root Biomass In An Engeimann Spruce-Subalpine Fir Stand In Northern Utah, Larry O. Gadt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

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 …