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, and carbon-to-nitrogen (C/N) ratio of container-grown green ash in Nov. 2005 after growing for 9 months with different N rates and types of fertilizers [urea formaldehyde (UF) and controlled-release fertilizer (CRF)] in 2005. Fertilizer N uptake
, University Park) for processing and analysis. Laboratory tests measured the following properties: pH, carbon:nitrogen (C:N) ratio, soluble salts, solids, moisture, organic matter, carbon, total nitrogen (N), organic nitrogen, ammonium nitrogen, phosphate (P 2
adequate soil S levels. Table 5. Means and sample ranges for soil carbon (C), soil sulfur (S), soil nitrate-nitrogen (NO 3 -N), soil organic matter (SOM), soil C:N ratio, and soil C:S ratio for the 2008 pecan orchard survey. Soil Fe was not measured in 2008
microbial growth that then benefits a specific crop ( Trinsoutrot et al., 2000 ). However, the carbon:nitrogen ratio of mulch clearly affects nutrient availability to the plant ( Congreves et al., 2012 ; Manzoni et al., 2010 ) and may be one of the most
residues that are low carbon/nitrogen, but even modest gains in SOM in these soils markedly improves cation exchange capability, nutrient cycling, and nutrient availability. Annual rates of SOM decomposition in most soils do not exceed 2% to 5% ( Paul and
stems and coarse roots and accumulated N in fine roots and accumulated C in old stems. Fig. 2. Nitrogen (N) concentration and carbon to N (C/N) ratio in current-year (2006) stems of green ash trees grown with different rates of N from two types of
carbon-to-nitrogen (C/N) ratio of 15.06. Commercial sphagnum peat, perlite, and vermiculite were donated by Fafard, Inc. (Apopka, FL). The sphagnum peat was from Canada, designated as Canadian peat; it had a pH of 3.9, an EC 0.32 dS·m −1 , and a C/N ratio
of substrates for greenhouse crops, noted the importance of organic matter stability and the C:N ratio as it relates to N immobilization affecting plant growth during production. The high C:N ratio of wood substrates can result in the tie-up of N from
for transplant production. The compost was relatively high in total nitrogen (N) but low in nitrate-N and ammonium-N. However, the carbon:nitrogen (C:N) ratio of 10.8:1 was within the range (10:1 to 15:1) given by Sullivan and Miller (2001) for
community collected shade tree leaves was determined ( Heckman and Kluchinski 1996 ). The laboratory analysis ( Table 1 ) reveals that the material typically has 50 parts carbon (C) to 1 part N. Knowing this ratio is key to understanding how readily a plant