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Janni Bjerregaard Lund, Theo J. Blom, and Jesper Mazanti Aaslyng

One of the environmental concerns in the production of potted plants is the use of plant growth retardants (PGRs) for the control of plant height. In the search for alternatives to PGRs, changes in light quality [e.g., increased red to far

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Inmaculada Moreno-Alías, Hava F. Rapoport, Rafael López, Lorenzo León, and Raúl de la Rosa

et al., 1976 ; Zimmerman, 1977 ) and, more recently, olive ( De la Rosa et al., 2006 ; Pritsa et al., 2003 ; Rallo et al., 2008 ). In this latter species, early elimination of plants with a long juvenile period is based on plant height measured

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Songul Sever Mutlu and Ece Agan

, 1980 ; Nau, 1989 ; Vasudevan et al., 2008 ). Effects of pinching in terms of significant reduction in plant height, delayed flowering, and increased number of flowering stems have been reported in many commercial flower crops ( Debra and Lewis, 1986

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Amir Rezazadeh, Richard L. Harkess, and Guihong Bi

influence of PBZ on increased drought tolerance was due to a reduction in transpiration, shorter plant height, diminished biomass and leaf area, and an increase in stomatal resistance ( Fernández et al., 2006 ). Flurprimidol is a triazole similar to PBZ and

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Christopher J. Currey, Roberto G. Lopez, Brian A. Krug, Ingram McCall, and Brian E. Whipker

Easter lilies are an important flowering potted crop in the United States with a wholesale value over $26.8 million for the 15 largest-producing states in 2010 ( U.S. Department of Agriculture, 2011 ). Plant height can reach up to 1 m and must be

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Christopher J. Currey, Nicholas J. Flax, and Kellie J. Walters

plug producer (Wagner Greenhouses, Minneapolis, MN). Seedlings were individually planted in 1801-cell packs [3.11 inches length and width, 2.25 inches height, 17.7 inch 3 volume (STI-1801; T.O. Plastics, Clearwater, MN)] filled with a commercial

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Dipak Sharma-Poudyal, Timothy C. Paulitz, and Lindsey J. du Toit

until harvest. Onion seedlings in each cone-tainer were thinned to two seedlings 3 weeks after planting. Plant height (cm), root length (cm), and total dry biomass (g) were measured for the two seedlings in each inoculated and noninoculated cone

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Kelly M. Stanton, Sally S. Weeks, Michael N. Dana, and Michael V. Mickelbart

flowering is reduced. Pruning them to half-height still encourages new growth but allows the development of a larger plant. To date, however, there are no similar published reports or recommendations on pruning strategies for meadowsweet or steeplebush

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Christopher J. Currey, Diane M. Camberato, Ariana P. Torres, and Roberto G. Lopez

photoperiod (0600–2200 hr ) consisting of natural daylengths with supplemental lighting. High-pressure sodium lamps delivered a supplemental photosynthetic photon flux ( PPF ) of 100 μmol·m −2 ·s −1 at plant height [as measured with a quantum sensor (LI

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Julie Bussières, Stéphanie Boudreau, Guillaume Clément–Mathieu, Blanche Dansereau, and Line Rochefort

in 2005 ( Environment Canada, 2006b ). Water table depth measured in one well throughout the summer of 2002 remained below 50 cm from July to September. Expt. 1: Fertilizer rates. Seedlings (tray of 45 plants or 110 cm 3 , height unrecorded