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David E. Aldous

Thanks to the following people for contributing to this paper: Professor Margaret Burchett, Faculty of Science, University of Technology, Sydney, Margaret Armstrong, Horticultural Therapy Association of Victoria, Cynthia Carson, Department

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Luis J. Belmonte-Ureña, Jose A. Garrido-Cardenas, and Francisco Camacho-Ferre

technique, and in 1923, Watanabe described the oblique splice graft ( Suzuki, 1972 ). Bravenboer’s work in 1962 seem to be the origin of horticultural grafting in solanaceous plants ( Louvet, 1974 ). From the special phytotechnic perspective, in horticulture

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Brian K. Hogendorp, Raymond A. Cloyd, and John M. Swiader

The function of silicon in horticultural crops is not well understood, primarily because silicon is not considered an element essential for plant growth as indicated by the “criteria of essentiality” defined by Arnon and Stout (1939) ( Epstein

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J. Pieters, B. Van Assche, and A. Buekens

The solid waste streams specific to soilless horticulture (substrate slabs, propagation cubes, and plastic films to cover the soil and to wrap the substrate slabs) were determined quantitatively and qualitatively, while methods to reduce these waste streams without yield loss were evaluated in a case study applied to the Flanders region of Belgium and based on an explorative inquiry among horticulturists. Rockwool used for substrate slabs and propagation cubes was found to be by far the most important waste stream. The use of long-lived, polyurethane (PUR) slabs could reduce the total slab waste stream by ≈90%. Moreover, if substrate blocks are used instead of slabs, this reduction could even increase to 95%. The introduction of new cultivation techniques could further reduce the required volume of substrate slabs. Rockwool propagation cubes could be successfully replaced with peat pots that can be composted after 1 year of use. The reuse of plastic films to cover the soil or to wrap the substrate slabs cannot be considered because of the danger of plant diseases. Due to the susceptibility of these films to contamination, they cannot yet be recycled on a large scale. The use of thinner films and the cultivation on profiled concrete floors were found to allow drastic reductions (of up to 80%) of the quantity of plastics used.

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Anthony G. Biggs

129 ORAL SESSION 38 (Abstr. 267–270) Cross-commodity: International Horticulture

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Gayle M. Volk, James W. Olmstead, Chad E. Finn, and Jules Janick

The world’s fruit industry is based on distinct clones that have uniquely desirable horticultural characteristics. The genetic improvement of fruits known as fruit breeding in its broadest sense has an ancient tradition that dates back to the

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Hyo-Geun Park and Jung-Ho Kim

111 WORKSHOP 11 (Abstr. 938–942) Specialized Production and Utilization of Horticultural Crops in Korea

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Robert C. Morrow

Solid-state lighting using light-emitting diodes (LEDs) represents a fundamentally different technology from the gaseous discharge-type lamps currently used in horticulture. Capabilities like spectral composition control and high light output with

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Harrison G. Hughes and James E. Klett

84 WORKSHOP 11 Teaching Horticulture in Changing Times

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Francisco Alcon, Mari Carmen García-Martínez, María Dolores De-Miguel, and María Ángeles Fernández-Zamudio

Recent decades have witnessed important changes in international production of horticultural crops. Furthermore, food safety and quality demands must be added to the progressive increase in consumption. Year-round demand means production must take