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Comparison of the European Standard Methods and the Rural Development Administration Methods for Determining Physical Properties of Horticultural Substrates  

Lee, Hyun-Haeng (National Institute of Agricultural Science Technology)
Ha, Sang-Keon (National Institute of Agricultural Science Technology)
Kim, Kye-Hoon (Dept. of Environmental Horticulture, The University of Seoul)
Kang, Ji-Young (National Instrumentation Center for Environmental Management)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.39, no.2, 2006 , pp. 116-122 More about this Journal
Abstract
This study was carried out to compare physical properties of the horticultural substrates measured by the European standard methods (CEN methods) and the Rural Development Administration of Korea methods (RDA methods). Sixty horticultural substrates including 40 marketed substrates and 10 organic and inorganic raw materials such as peat moss, coir dust, rice hull, perlite and zeolite were sampled. The samples were then analyzed for 6 physical properties by both CEN methods and RDA methods. The results of both methods were analyzed by linear regression. Bulk density ($R^2=0.8304$), particle density ($R^2=0.8136$) and porosity ($R^2=0.6374$) values measured by the two methods were highly significant. Whereas those for easily available water (EAW, $R^2=0.3327$), water volume ($R^2=0.2692$) and air volume ($R^2=0.0739$) were not significant. Further research is needed to facilitate the conversion between the two methods.
Keywords
CEN methods; RDA methods; Plug seedling; Bulk density; Particle density;
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