, NC). The organic compost had average properties of 6.9 pH, 2.91 mS·cm −1 electric conductivity, and a carbon to nitrogen ratio of 10.9:1. Estimated available nutrients for the crop are 0.6% N, 0.03% phosphorus (P), 0.2% K, 10.3% calcium (Ca), 0
; Wyatt et al., 1992 ). In addition, mulches that immobilize nitrogen because of a high carbon to nitrogen ratio may influence the quality (e.g., protein and sugar content) of the floral resources produced and thus pollinator visitation and crop
(TNSC) and nitrogen (N), and the carbon-to-nitrogen ratio (C/N) in leaves of strawberry plants that received N fertigation only (fertigation) or fertigation + urea applied as a foliar spray in fall (fertigation + foliar urea). z Fig. 1
quadratic ( Q ) contrasts over time. Fig. 2. Total plant growth rate, rate of nitrogen (N) uptake from fertilizer, and carbon-to-nitrogen ratio (CN) of three Rhododendron cultivars grown in containers with (+N) or without (–N) additional N
) 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
leave relatively little shoot residue on the bed surface. At this point, the biomass is typically extremely succulent with a low carbon to nitrogen ratio (9 to 12) and would contain at least 100 kg·ha −1 N ( Brennan and Boyd, 2012b ; Brennan et al
NT, ST, and CT treatments were also reduced. Carbon-to-nitrogen ratio of cover crop residue was highest for NT and ST treatments in both years ( Table 2 ). Table 2. Aboveground biomass (Mg·ha −1 ) and C:N ratio of cereal rye-hairy vetch cover crop at
significantly reduced the plant fresh weight and SPAD, which were related to the high soil carbon to nitrogen ratio (C/N) after adding high concentrations of grape pruning material. Previous studies have indicated that when soil has a high C/N, the