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Jennifer Reeve and Dan Drost

sustainable manner is challenging in intensively cropped systems such as high tunnels ( Montri and Biernbaum, 2009 ). Intensively tilled soils can develop hard pans, cloddy structure, surface crusting, and loss of organic matter. These problems negatively

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Shawna Loper, Amy L. Shober, Christine Wiese, Geoffrey C. Denny, Craig D. Stanley, and Edward F. Gilman

contain low amounts of soil organic matter (OM) and nutrients (particularly nitrogen and phosphorus) ( Jim, 1998 ). As a result, the urban soil environment is usually not conducive to healthy root growth and function, which could lead to problems with

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Carl J. Rosen and Deborah L. Allan

soil ( Dimitri and Greene, 2002 ). Now, organic produce generally commands a higher price than conventional produce ( Oberholtzer et al., 2005 ), prompting producers to grow crops organically. The increased consumer demand appears to be driven primarily

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Stephanie Wedryk, Joel Felix, Doug Doohan, and John Cardina

mechanical techniques that aid in building soil fertility and suppressing weeds with the potential to enhance yields in the first organic year ( Hanson et al., 2004 ). Compost applications during transition to organic vegetable production and after transition

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Ajay Nair and Mathieu Ngouajio

practices. Transitioning to organic production often involves adjustments, technical know-how, and tools to better manage issues pertaining to soil fertility, weed, and pest populations ( Dabbert and Madden, 1986 ). However, once a proper balance is

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Xiaoyan Dai, Donald M. Vietor, Frank M. Hons, Tony L. Provin, Richard H. White, Thomas W. Boutton, and Clyde L. Munster

low-quality soils on urban landscapes, contribute to increased concentrations of soil organic carbon (SOC) within amended depths ( Hansen et al., 2007 ; Vietor et al., 2007 ; Wright et al., 2005 ). Increased SOC enhances water infiltration and soil

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Dennis C. Odero, Jose V. Fernandez, and Nikol Havranek

soils (Histosols) that were formed under flooded conditions, which precluded decomposition of organic matter, allowing those materials to form organic soils with up to 85% or more organic matter ( Snyder, 1994 ; Wright and Hanlon, 2009 ). About 3200 ha

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Heidi J. Johnson, Jed B. Colquhoun, Alvin J. Bussan, and Carrie A.M. Laboski

Nitrogen management for optimal crop production is one of the most difficult and costly practices in organic agriculture. The majority of the N in organic sources is bound in organic compounds, which must be mineralized by the soil microbial

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David M. Butler, Gary E. Bates, and Sarah E. Eichler Inwood

have a negative impact on chemical, physical, and biological measures of soil quality ( Haynes and Tregurtha, 1999 ). Increasing organic matter inputs through crop residue conservation ( Lal, 1995 ), cover crops ( Snapp et al., 2005 ), and manures or

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Dennis C. Odero and Alan L. Wright

Snap bean ( Phaseolus vulgaris L.) is an important crop cultivated in the EAA of south Florida for the processing market. The EAA is dominated by organic soils (histosols) with up to 85% organic matter underlain by limestone bedrock ( Snyder, 1994