. Regeneration in mixed conifer clearcuts in the Cascade Range and the Blue Mountains of Eastern Oregon. Clearcutting Oregon; Conifers; Forest regeneration Oregon. Appendix I. Independent (X) variables used in regression analyses. 1- -Age of clearcut. The number of years since the area was harvested. 2- -Elevation. The average elevation of the plot to the nearest 10 feet as measured with an altimeter. 3- -Aspect. One of eight com- pass points measured on each subplot. Aspect was coded using the method proposed by Day and Monk (1974) , in which the following values were assigned to compass dire
. Regeneration in mixed conifer clearcuts in the Cascade Range and the Blue Mountains of Eastern Oregon. Clearcutting Oregon; Conifers; Forest regeneration Oregon. Appendix I. Independent (X) variables used in regression analyses. 1- -Age of clearcut. The number of years since the area was harvested. 2- -Elevation. The average elevation of the plot to the nearest 10 feet as measured with an altimeter. 3- -Aspect. One of eight com- pass points measured on each subplot. Aspect was coded using the method proposed by Day and Monk (1974) , in which the following values were assigned to compass directions: N - 14; NE - 15; E - 11; SE - 7; S - 3; SW - 2; W - 6; NW - 10. Average coded value of the 25 subplots was used in analyses. 4- -Slope. Percentage slope of each subplot was measured with clinometer and coded as follows: 0-9% 0; 10-19% 1; 20- 29% 2; 30-39% 3; etc. Average coded value of subplots used. 5- -Mineral soil. The percentage of each subplot containing mineral soil was estimated, coded in the same way as slope values, and averaged. 6- -Litter. The percentage of each subplot covered with litter was estimated, coded in the same way as slope values, and averaged. 7- -Slash. The percentage of each subplot covered with slash was estimated, coded in the same way as slope values, and averaged. 8- -Litter and slash. The per- centage of each subplot covered with litter and slash was estimated, coded in the same way as slope values, and averaged. 9- -Degree of burn. Estimated on each subplot and coded as None 0; Light 1; Medium 2; Heavy 3. Average coded value used in analyses. Degree of burn definitions are: None--no visible effect of fire. Light-- fire charred surface of forest floor but did not remove all of litter layer. Medium--fire removed all of litter layer and some of the duff. Heavy--fire removed all litter and duff and imparted a coloration to the mineral soil. 10- -Forbs. The percentage of each subplot covered with forbs was estimated, coded in the same way as s
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