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Timothy K. Broschat

needle mulches of ≈60, 69, 78, and 41 μg·cm −3 , respectively, represent significant contributions of this element to soil fertility. Both pine bark and eucalyptus mulch increased soil Mg concentrations above that of unmulched control plots in Expt. 2

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T.R. Konsler, S.W. Zito, J.E. Shelton and E.J. Staba

Abbreviations: RN, root tissue nutrients; SF; soil fertility; Tg, spectrophotometric measure of total ginsenosides. 1 Professor Emeritus. 2 Associate Professor. 3 Professor. Paper no. 12054 of the Journal Series of North Carolina Agricultural

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Chenping Xu and Beiquan Mou

biological characteristics of soil ( Herrick, 2000 ; Liu et al., 2006 ). In this context, the use of organic soil amendments to improve soil fertility and enhance crop yield has gained considerable momentum for agroecological sustainability ( D’Hose et al

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Jennifer Reeve and Dan Drost

generally planted outdoors in mid- to late May with harvest beginning in late July or early August. High tunnels are used to advance the planting dates by 4–6 weeks and the harvest dates by a month or more. Maintaining soil quality and fertility in a

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Sharon J.B. Knewtson, Jason J. Griffin and Edward E. Carey

treatments within fertility treatments. Analysis of variance was calculated using SAS 9.1 (Statistical Analysis System Institute, Cary, NC) holding block and block by fertilizer as random effects. Silt loam soil site. Experiments with application of the

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Joseph R. Heckman, Ray Samulis and Peter Nitzsche

1 Extension Specialist in Soil Fertility; to whom reprint requests should be addressed. E-mail address: heckman@aesop.rutgers.edu 2 County Agricultural Agent. The research reported in this publication was supported by the New Jersey

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Amaya Atucha and Greg Litus

surface area ( Lehmann, 2007a ; Thies and Rillig, 2009 ). Studies have shown that soil amendments with biochar have improved soil fertility, as a result of an increase in pH of acid soils ( Zwieten et al., 2010 ), or increase in nutrient retention as a

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Monica Ozores-Hampton

break down plant and animal materials into more available forms suitable for application to the soil ( USDA, 2016 ). There are no compost use quality guidelines in the NOP that address the physical, chemical, and biological properties of compost for

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Robert L. Mikkelsen

generally work with the same basic global resources. Although specific nutrient management techniques and options may vary between the two systems, the fundamental processes supporting soil fertility and plant nutrition do not change ( Stockdale et al., 2002

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K. Delate, C. Cambardella and A. McKern

through national surveys ( Walz, 2004 ) and statewide focus groups ( Delate and DeWitt, 2004 ), have included soil fertility and pest management strategies. Fertility sources for organic vegetable crops generally include crop rotations and combinations of