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Working groups under the Commission of Plant Substrates and Soilless Cultivation of the ISHS (Growing Media, Composting for Horticultural applications, Substrate analysis, Hydroponics, Aquaponics) and the International Peat Society are pleased to announce a joint Symposium from June 17-21 2013 in Leiden, The Netherlands. The Symposium is organized under the auspices of the International Society for Horticultural Science in joint cooperation with the International Peat Society. The event will be organised by Wageningen UR Greenhouse Horticulture. More info at


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