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Rick A. Boydston, Treva Anderson, and Steven F. Vaughn

The use of herbicides in container-grown ornamentals is often limited as a result of the lack of registered products for use in greenhouses and the difficulty in assuring crop safety on numerous species grown in ornamental nurseries. Typically

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Rick A. Boydston, Harold P. Collins, and Steven F. Vaughn

separate studies, 20 seed of annual bluegrass ( Poa annua ) and common chickweed ( Stellaria media ) were seeded on the surface of 7.5-L pots containing 0%, 1.25%, 2.5%, 5%, 10%, and 20% (by weight) DDGS-amended potting mix. Containers were placed in a

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Kenneth G. McCabe, James A. Schrader, Samy Madbouly, David Grewell, and William R. Graves

Valued at $10.5 billion in 2009, the container crops industry is a large sector of commercial horticulture that produces over four billion plants in containers per year and uses over 1.6 billion pounds of petroleum plastic for containers ( Schrader

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Bethany A. Harris, Wojciech J. Florkowski, and Svoboda V. Pennisi

The U.S. Environmental Protection Agency reported that the rate of plastic waste recycling was only 9.1% in 2015 ( U.S. Environmental Protection Agency, 2017 ). Four billion container/plant units are produced by the container crop industry annually

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Andrew H. Jeffers, William E. Klingeman, Charles R. Hall, Marco A. Palma, David S. Buckley, and Dean A. Kopsell

might occur between different methodologies of liner production, we modeled three of the most prominent liner production systems: 1) field ground bed system, 2) polyhouse-covered ground bed system, and 3) polyhouse-covered container system. Production

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Geraldine J. Cashion and Thomas H. Yeager

144 POSTER SESSION (Abstr. 547–556) Container Production–Woody Ornamentals/Landscape

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Jeff B. Million and Thomas H. Yeager

The container nursery industry is facing severe restrictions on water use ( Beeson et al., 2004 ). Container substrate water deficits can be measured directly by weighing ( Beeson, 2011 ; Million et al., 2010 ; Owen et al., 2007 ), indirectly with

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Marion J. Packett, Alex X. Niemiera, J. Roger Harris, and Ronald F. Walden

144 POSTER SESSION (Abstr. 547–556) Container Production–Woody Ornamentals/Landscape

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Susmitha Nambuthiri, Robert L. Geneve, Youping Sun, Xueni Wang, R. Thomas Fernandez, Genhua Niu, Guihong Bi, and Amy Fulcher

Large-scale container-grown nursery plant production began in the early 1950s and helped to diversify the nursery industry. Most of the clay, recycled metal, and wooden containers initially used in nurseries were replaced by plastic containers in

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Charles W. Marr and Mark Jirak

Tomatoes (Lycopersicon esculentum Mill. cv. Jet Star) seedlings grown in small cells (plugs) in trays holding 200, 406, or 648 plants per flat (28 × 55 cm) were larger after 6 weeks as cell size increased, but all were acceptable. Other seedlings, transplanted at weekly intervals from plug trays to plastic cell packs (48 cells per 28 × 55-cm flat), were of similar size during weeks 1-3; seedlings from 648-plug trays were smaller than the others by week 5-6. Seedlings from 200-plug trays planted at weekly intervals into containers where plant-plant competition was absent were larger through 6 weeks than those from 406- and 648-plug trays. Early marketable and total yields were similar for plants held in 406-plug trays 1 to 4 weeks before their transfer to 48-cell flats, but yield decreased for those held 5 to 7 weeks.