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Susan Barton, Jules Bruck and Chad Nelson

to simply tour interesting sites ( Andrews and Henze, 2009 ). In Spring 2006, three faculty members in the University of Delaware's (UD) Department of Plant and Soil Sciences began planning for a new study abroad program entitled “Landscape

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James A. Gagliardi and Mark H. Brand

-sustaining populations in natural landscapes can alter the composition of native plant communities through physical displacement ( Webb et al., 2000 ; Woods, 1993 ) and interspecific hybridization ( Pooler et al., 2002 ). These perturbations have cascading effects on

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Amy L. Shober, Kimberly A. Moore, Nancy G. West, Christine Wiese, Gitta Hasing, Geoffrey Denny and Gary W. Knox

Fertilization requirements for establishment of shrubs in the landscape have received limited attention in part because woody dicots often perform well with little or no supplemental fertilizer ( Broschat et al., 2008 ). However, much of the

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Timothy K. Broschat

Palms are an important component of landscapes in subtropical and warm temperate climates of the United States as a result of their bold leaf texture, small footprint in the landscape, and the tropical or Mediterranean look they impart to a

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Eugene K. Blythe, Cecil Pounders, Michael Anderson, Earl Watts and Barbara Watts

Daylily is highly valued throughout the world as an easily grown herbaceous perennial for the landscape, with a proper selection of species and clonal hybrids providing an ongoing display of flowers from spring through fall. Daylily varies in growth

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L.R. Costello, N.P. Matheny and J.R. Clark

Since it is unlikely that crop coefficients will be established for landscape plantings, a method to estimate landscape water requirements is proposed. By evaluating three factors that significantly influence water use-species planted, vegetation density, and site microclimate-and assigning numerical values to each, an estimate of a landscape crop coefficient (or landscape coefficient, KL) can be calculated. An estimate of evapotranspirational water loss for landscapes is then the product of the landscape coefficient multiplied by the reference evapotranspiration. This paper presents values for the above three factors and discusses the rationale for each. Examples using the landscape coefficient formula are included, as well as a discussion of special considerations relative to its use.

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S. Christopher Marble, Andrew K. Koeser, Gitta Hasing, Drew McClean and Annette Chandler

Many studies have analyzed the benefits and disadvantages of common weed control techniques in urban or suburban landscape settings as they pertain to weed control. In most cases, homeowners or landscapers will use mulch (organic or inorganic

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Judson S. LeCompte, Amy N. Wright, Charlene M. LeBleu and J. Raymond Kessler

., 2002 ). Salinity tolerance research conducted on landscape plant species has commonly been conducted using simulated reclaimed wastewater (treated municipal effluent) ( Marcotte et al., 2004 ; Miyamoto et al., 2004 ; Niu et al., 2007 , 2012 ; Wu et

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Carolyn F. Scagel, Guihong Bi, David R. Bryla, Leslie H. Fuchigami and Richard P. Regan

Nursery practices for container-grown perennial plants attempt to optimize plant growth and appearance both in the containers and after transplanting in the landscape. Numerous factors influence plant performance after transplanting, including water

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Melody Reed Richards, Larry A. Rupp, Roger Kjelgren and V. Philip Rasmussen

growth and water demand in the face of limited water resources is forcing the adoption of water conservation, especially during periods of drought. Since as much as 50% to 60% of municipal water use is for urban landscaping ( Kjelgren et al., 2000