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S. Christopher Marble, Stephen A. Prior, G. Brett Runion, H. Allen Torbert, Charles H. Gilliam, Glenn B. Fain, Jeff L. Sibley, and Patricia R. Knight

ruminant animals, flooded rice fields, biomass burning, and manure management and storage ( Cole et al., 1997 ; Johnson et al., 1993 ; USDA, 2008 ). Nitrous oxide emissions are a direct result of increased use of synthetic fertilizers and production of

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Joji Muramoto, Richard F. Smith, Carol Shennan, Karen M. Klonsky, James Leap, Miriam Silva Ruiz, and Stephen R. Gliessman

soil organic matter, compost, recently incorporated crop and cover crop residues, and various organic fertilizers. Cover crops can provide an inexpensive source of N for crop production ( Smith, in press ; Wyland et al., 1996 ). Use of a legume

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Lauren Lindsey, Raymon Shange, Ramble O. Ankumah, Desmond G. Mortley, and Sangita Karki

et al., 2009 ). Several researchers have demonstrated a wide range of effects of fertilizer, including nitrogen on storage root yield of sweetpotatoes. For example, Jet and Mulkey (1996) reported that the applying N at 50.4 kg·ha −1 21 d after

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Tyler C. Hoskins, James S. Owen Jr., and Alex X. Niemiera

effective fertilizer application method in reducing nitrogen (N) and phosphorus (P) runoff as compared with systems where dissolved nutrients are applied through irrigation water (i.e., fertigation or liquid feed) ( Wilson and Albano, 2011 ). However, the

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Jongtae Lee

). Characteristically, such a root system leads to the low density of roots in onion. This shallow root system means onion requires more fertilizer to produce the crop ( Brewster, 2008 ; Greenwood et al., 1982 ). For sustainable crop production, pesticides and

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Heather Hasandras, Kimberly A. Moore, and Lyn A. Gettys

/habit and grows in similar areas, southern naiad is a Florida-native plant that is often mistaken for the invasive weed hydrilla ( University of Florida, 2015 ). Hydrilla control and growth in different substrates and at fertilizer rates has been researched

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Yan Chen, Regina P. Bracy, Allen D. Owings, and Joey P. Quebedeaux

Use of slow-release fertilizers or CRF is being recommended to the landscape service industry as a best management practice ( Florida Yards & Neighborhoods, 2006 ; Louisiana Yards & Neighborhoods, 2007 ). Benefits of using CRF include improved

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P. Chris Wilson and Joseph P. Albano

Nitrogen applications are essential for producing quality ornamental plants. Nitrogen commonly is applied as nitrate (NO 3 − ) or ammonium (NH 4 + )-N in commercially available soluble and/or controlled-release fertilizer formulations. Ammonium-N is

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Hadi Susilo and Yao-Chien Alex Chang

being stored in the plants ( Susilo et al., 2013 ). In another study, we quantified the contribution of fertilizer N stored throughout the vegetative stage of Phalaenopsis to the developing inflorescence when fertilizer supply was ample during forcing

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Deron Caplan, Mike Dixon, and Youbin Zheng

Scheifele, 2008 ). It is difficult, however, to estimate fertilizer requirements of drug-type cannabis based on fiber-type cannabis or other crops because of the differences in species and growing conditions ( Wright and Niemiera, 1987 ). Furthermore, it is