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Greenhouse Gas Emissions during Co-Composting of Calf Mortalities with Manure

^a Agriculture and Agri-Food Canada Lethbridge Research Centre, 5403 1st Ave S., Lethbridge, AB, T1J 4B1 Canada
^b Alberta Agriculture and Food, 5401 1st Ave S., Lethbridge, AB, T1J 4V6 Canada
^c College of Resources and Environment, China Agricultural Univ., Beijing, P.R. China 100094

View larger version (20K): [in this window] [in a new window]   Fig. 1. Mean daily air temperature and precipitation during the composting period (13 Dec. 2004 to 28 Sept. 2005).

View larger version (66K): [in this window] [in a new window]   Fig. 2. Compost windrow temperatures recorded by indwelling multi-depth probes during 289 d of composting of (a) barley straw and manure (control compost, CK) or (b) barley straw, manure, and calf mortalities (mortality compost, CM). Arrows indicate windrow turning dates.

View larger version (10K): [in this window] [in a new window]   Fig. 3. Flux of greenhouse gases CO2, CH4, and N2O at the surface of compost windrows constructed from barley straw and manure (control compost, CK) or from barley straw, manure, and calf mortalities (mortality compost, CM) during 289 d of composting. Bars indicate SEs, and arrows indicate windrow turning dates.