Plant Soil Environ., 2008, 54(10):413-419 | DOI: 10.17221/404-PSE
Spatial variability of total soil nitrogen and sulphur content at two conventionally managed fields
- Czech University of Life Sciences, Prague, Czech Republic
Spatial variability of total soil nitrogen and sulphur content has been observed in two plots (I - 54 ha and II - 32 ha). Soil samples were taken from the topsoil in a regular grid, which was localised by GPS (individual sampling points were 80 m apart); subsequently total soil N and S contents were analysed. The average N content in plot I was 0.16%; in plot II it was 0.12%. The content of S in plots I and II was 0.09% and 0.08%, respectively. Spatial variability of total N differed in separate parts of the plots. A higher variability was recorded in plot I, where the coefficient of variation (CV) was 15.7%, whereas in plot II it was only 11.1%. However, sulphur showed only little variability, and thus its coefficient of variation was low (2.5 a 2.3% in plots I and II, respectively). A positive and mostly conclusive relationship has been observed between the N content of soil and the crop yield. This effect was more significant in plot II. The S content in soil showed no correlation with yield. Furthermore, positive correlations were observed between field altitude, soil moisture and crop yield in both plots.
Keywords: soil; nitrogen; sulphur; spatial variability; yield
Published: October 31, 2008 Show citation
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