Variation in Natural N-15 Abundance of Central Saskatchewan Soils1
- R. E. Karamanos,
- R. P. Voroney and
- D. A. Rennie2
Natural 15N abundance data from 38 well-drained cultivated, 11 native pasture, and 9 saline seep soil profiles from Saskatchewan were compiled. The mean δa15N value (per mill 15N excess) for all surface soil samples was 9.4 with a standard deviation of 3.0. Land use was not a factor determining δa 15N values as there was no differences in the δa15N values of surface soil samples from cultivated and native pasture areas; the mean δa15N value for both these types of profiles was 8.6 with a standard deviation of 1.9. However, the mean δa15N value for saline seeps (13.8 ± 3.8) was significantly higher than that of either well-drained cultivated or pasture soils.
Spatial variability does not appear to unduly limit use of natural variations in 15N abundance to study important agronomic processes in Chernozemic soils.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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