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Guihong Bi, Carolyn F. Scagel, and Richard Harkess

in 2005 and urea treatment had no influence on biomass allocation between roots and shoots (ratio of roots to aboveground was ≈0.40 across all treatments). With several other deciduous plant species, low soil availability of N has been reported to

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Xiaojie Zhao, Guihong Bi, Richard L. Harkess, Jac J. Varco, Tongyin Li, and Eugene K. Blythe

amount of 15 N was taken up, N uptake efficiency (ratio of 15 N uptake to 15 N applied) in the spring growing season of 2013 was unaffected by 2012 N rate. Table 7. Percentage of nitrogen (N) derived from 15 NH 4 15 NO 3 fertilizer (NDFF%) of

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Kate A. Ivancic, Matthew D. Ruark, Francisco J. Arriaga, and Erin M. Silva

) in the field for FW yield calculation. Statistical analysis. Statistical analysis was completed using SAS (Statistical Analysis System, version 9.2; SAS Institute, Cary, NC). Cover crop biomass, N content, N yield, and carbon (C):N ratio were analyzed

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Kaori Itagaki, Toshio Shibuya, Motoaki Tojo, Ryosuke Endo, and Yoshiaki Kitaya

per area (LMA), and carbon-to-nitrogen ratio (C:N ratio). Fig. 4. Colony density of Podosphaera xanthii 7 d after inoculation (means of three trials), leaf mass per area (LMA) (means of three trials), and carbon-to-nitrogen ratio (C:N ratio) (trial 1

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Amaya Atucha, Ian A. Merwin, Chandra K. Purohit, and Michael G. Brown

) released in relation to the initial C-to-N ratio of litter residue during the summer of 2005 and 2007; P value for model fit = 0.0002 and 0.0331, respectively. C = carbon. Soil total carbon, nitrogen, and carbon-to-nitrogen ratios. Data are presented

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Rebecca L. Darnell, Nicacio Cruz-Huerta, and Jeffrey G. Williamson

species such as cotton ( Gossypium hirsutum ) and bean ( Phaseolus vulgaris ), however, leaves developed under LNT may acclimate to such conditions, resulting in carbon exchange rates as high as in plants growing under higher temperatures ( Singh et al

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Chris A. Martin, Sean A. Whitcomb, and Jean C. Stutz

landscapes, although this capacity might be somewhat less than in nearby undisturbed desert soils because of a higher carbon cost-to-benefit ratio. The authors have found no previous studies of the effect of frequent shearing of woody shrubs on AMF

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Monica Ozores-Hampton

depending on compost feedstocks, soil characteristics, and environmental conditions. It is generally considered that N immobilization occurs in composts when the initial carbon to nitrogen (C:N) ratio is greater than 20:1 and mineralization occurs when C

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Luisa Dalla Costa, Nicola Tomasi, Stefano Gottardi, Francesco Iacuzzo, Giovanni Cortella, Lara Manzocco, Roberto Pinton, Tanja Mimmo, and Stefano Cesco

growth and physiology in Picea glauca and Populus tremuloides at different soil temperatures Can. J. For. Res. 31 1922 1929 Lawlor, D.W. 2002 Carbon and nitrogen assimilation in relation to yield: Mechanisms are the key to understanding production

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Jeffrey R. Pieper, Rebecca Nelson Brown, and José A. Amador

incorporated as a green manure, usually before heading. Green manures have less lignin and a lower C:N ratio than straw ( Pinck et al., 1950 ) but have been shown to increase soil carbon in corn and grain systems ( MacRae and Mehuys, 1985 ; Paustian et al