The Spatial Variability of Nitrogen-15 and its Relation to the Variability of Other Soil Properties1
- F. Selles,
- R. E. Karamanos and
- R. G. Kachanoski2
The spatial variability of natural 15N abundance of a cultivated Chernozemic soil and its native prairie counterpart were smaller than that of total N, organic C, and the C/N ratio. Further, the number of samples required to estimate the true mean of total N with a given precision at various probability levels were twofold those required to determine the mean 15N abundance in both soils. The variability of organic C was > 10 times that observed for total N. The results of this study indicate that the spatial variability of the natural 15N abundance of total soil N in the surface horizons may reflect the isotopic composition of the nitrogenous substances entering the soil system or changes in the isotopic composition of soil N due to humification processes, probably induced by variations in topographic and microrelief features of the soil.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © .