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Nitrogen Dynamics of Decomposing Corn Residue Components Under Three Tillage Systems

^a Dep. of Natural Resource Sciences, Macdonald Campus of McGill Univ., Ste-Anne-de-Bellevue, QC, Canada H9X 3V9
^b Dep. of Agricultural and Biosystems Engineering, Macdonald Campus of McGill Univ., Ste-Anne-de-Bellevue, QC, Canada H9X 3V9

View larger version (23K): [in a new window]   Fig. 1. Mean monthly temperatures during 1996–1998 study. Data from Ste-Anne-de-Bellevue weather station of Environment Canada.

View larger version (42K): [in a new window]   Fig. 2. (a) Litterbag residue-N content and (b) mass versus degree-days above 0°C since placement, Nov. 1996 through Oct. 1998, averaged by depth.

View larger version (35K): [in a new window]   Fig. 3. Pooled litterbag residue-N content versus degree-days above 0°C since placement, Nov. 1996 through Oct. 1998, averaged by depth.

View larger version (20K): [in a new window]   Fig. 4. Spring 1999 study: N content of litterbag residues versus degree-days. Placed 2 May 1999 (no-till plots), and retrieved 10, 17, 30 May and 11 June.

View larger version (33K): [in a new window]   Fig. 5. Relationship between litterbag residue mass loss and N quantity recovered in residues.

View larger version (32K): [in a new window]   Fig. 6. Nitrogen concentration versus mass loss of litterbag residues.