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Technical Publications

File Bilderback et al 2005. Healthy substrates need physicals too.
Dr. Bilderback and colleagues present physical property guidleines for many pine bark-based substrates with amendments. They discuss challenges to adding amendments, volumes of those amendments, and how physical properties can change from beginning to end of production in containers. TE Bilderback, SL Warren, JS Owen, Jr., and JP Albano. HortTechnology 15:747-751.
File Bilderback 2009 A nursery friendly method for measuring air filled porosity of container substrates.
The description for construction of a "home built" porometer apparatus to measure air-filled porosity (AFP) is described. This is an excellent device to monitor bark supplied between distributors, after new amendments are incorporated, or if a long time has lapsed since the last time bark was obtained from a supplier. See photos section for examples of it in use. T Bilderback Research Conference 54:212-215 (2009).
File Cooke et al 2004. Physical property measurements in container substrates: a field quantification strategy.
Determining drained pore space (air space), using the simple procedure outlined here can provide useful insight into how to manage irrigation of crops having drainage or aeration problems and possibly into diagnosis of how to make changes to avoid future problems. A Cooke, T Bilderback, and M Lorscheider. SNA RESEARCH CONFERENCE 49:102-104 (2004).
File Buamsch, MG et al. 2007. Chemical and physical properties of Douglas Fir Bark relevant to production of container plants
Tested various properties of Douglas fir bark and found that properties differ less to age than to bark source. M. Gabriela Buamscha, JE Altland, DM Sullivan, DA Horneck, J Cassidy. HORTSCIENCE 42(5):1281–1286. 2007.
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This project received support from the North Carolina Department of Agriculture and Consumer Services as part of the Specialty Crops Block Grant Program.

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