. Germination, survival and early growth of conifer seedlings in two habitat types. Germination; Seeds United States Viability; Seedlings United States; Conifers United States Seeds; Conifers United States Seedlings. 50 r. May 14 May 21 May 3 June 18 July 1 July 16 August 5 September 2 to to to to to to to to May 21 June 3 June 18 July 1 July 16 Augusts September 2 October 15 Measurement period Figure 2.—Seedbed temperatures at the 5-centimeter depth, summer 1981, by habitat type. Each plotted point is the average of four clearcuts, from three randomly distributed, unshaded maximum-minimum soi
. Germination, survival and early growth of conifer seedlings in two habitat types. Germination; Seeds United States Viability; Seedlings United States; Conifers United States Seeds; Conifers United States Seedlings. 50 r. May 14 May 21 May 3 June 18 July 1 July 16 August 5 September 2 to to to to to to to to May 21 June 3 June 18 July 1 July 16 Augusts September 2 October 15 Measurement period Figure 2.—Seedbed temperatures at the 5-centimeter depth, summer 1981, by habitat type. Each plotted point is the average of four clearcuts, from three randomly distributed, unshaded maximum-minimum soil thermometers with buried sensing pro- bes in each clearcut. Dense herbaceous vegetation became established on several of the seedbeds, obscuring the conifer seedlings. Seedling survival did not seem to be adversely af- fected by this vegetative competition. Instead, the shade provided by invading weedy species seemed to benefit seedling survival during the hot, dry month of August 1981. Numbers of invading species and total vegetative cover were higher on the Achlys habitat type than on the Xerophyllum type. Animal damage seemed to be more severe on the Achlys habitat type than on the Xerophyllum type. More gopher mounds were observed on the Achlys habitats. Elk completely destroyed one Achlys seedbed by trampling the berry baskets and scat- tering the maximum-minimum thermometers; deer destroyed another. 11. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Minore, Don. cn; Pacific Northwest Research Station (Portland, Or. ) cn. [Portland, Or. ] : U. S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station
Size: 2085px × 1199px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectgermination
