Chemical and physical properties of Douglas fir bark relevant for the production of container crops in Oregon Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/wm117t27z

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  • It is widely accepted among nursery producers that [Pseudotsuga menziesii (Mirbel) Franco] bark (DFB) is an excellent substrate for container production, hence its widespread use in Oregon and other regions where Douglas fir constitutes a significant portion of the forest products industry. Despite its widespread use, little information is available on the chemical and physical properties of DFB as it pertains to use in container substrates. Therefore, three studies were conducted with the following objectives; (i) document baseline chemical and physical properties of fresh and aged DFB that have relevance to production of container plants; (ii) evaluate micronutrient availability in fresh and aged DFB; and (iii) determine if differential plant growth measured between fresh and aged DFB could be explained by differences in nitrogen immobilization and decomposition rates between the two bark ages.
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