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to promote decomposition. Composted bark is rarely used in Oregon container nurseries due to the additional costs associated with its preparation. Physical and chemical properties of DFB as they pertain to use in nursery container substrates have only
components that break down slowly or do not decompose. Blending aggregates with organic components can decrease changes in physical properties of potting media over time. VARIABILITY AMONG AND WITHIN BRANDS OF RETAIL POTTING MEDIA Popular press articles
), and ‘Black and Blue’ salvia ( Salvia guaranitica ) in CCR and reported similar results among most substrate blends. Substrates with plants having less growth were primarily the result of substrate physical properties as 100% CCR had high air space and
.A. Ahmed, S. 2004 Improvement of degraded physical properties of a saline-sodic soil by reclamation with kallar grass ( Leptochloa fusca ) Plant Soil 258 207 216 10.1023/B:PLSO.0000016551.08880.6b Anderson, J.M. Ingram, J.S.I. 1993 Tropical soil biology and
%, 40%, or 50% (by volume) perlite (Carolina Perlite Co., Gold Hill, NC) or PWC plus a 100% peatmoss (0% aggregate) to produce a total of 11 substrate treatments. Substrate physical properties, including air space [AS (percent by volume)], total porosity
( Aslam et al., 2013 ; Senseman, 2007 ; Weber, 1990 )]. In addition to herbicide properties, herbicide adsorption will be influenced by the chemical and physical composition of mulch or plant residues, which are dependent on material age or stage of
J. Amer. Soc. Hort. Sci. 103 752 756 Buck, J.S. Evans, M.R. 2010 Physical properties of ground parboiled fresh rice hulls used as a horticultural substrate HortScience 45 643 649 10.21273/HORTSCI.45.4.643 Currey, C.J. Lopez, R.G. 2010 Paclobutrazol
larger when grown in aged bark compared to fresh bark. They concluded that differences in plant growth between the two bark types were likely a function of the substrates' physical pro-p-erties. Mechanical Thinning of Peach and Apple Trees Reduces Labor
majority of commercial substrates used in nurseries; its excellent physical, chemical, and biological properties make it ideal for growing horticultural seedlings ( Abad et al., 2001 ; Burés, 1997 ). Peat is collected from bogs, marshes, and wetlands
and Biernbaum, 1996 ). These can result in different physical and chemical properties between commercial substrates, especially nutrient composition ( Abad et al., 2002 ; Benito et al., 2006 ; Higashikawa et al., 2010 ). Higashikawa et al. (2010