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vol. 18, nr. 2 (2011)
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Evaluation of spatial variability of soil texture and organic C content in soil in a loess landscape
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Jerzy Rejman, Iwona Iglik, Ryszard Brodowski, Marcin Turski, Marian Smarz
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Institute of Agrophysics PAS, Doświadczalna 4, 20-290 Lublin, Poland |
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vol. 18 (2011), nr. 2,
pp. 409-419
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abstract:
Spatial variability of soil texture and organic C content was evaluated in a field situated in the upper part of a loess catchment. Soil parameters were determined in the arable soil layer (0-25 cm) with sampling in a regular grid of 10 m (72 points). Spatial variability was described by means of isotropic spherical semivariance models. Range of autocorrelation of soil texture was dependent on soil particle size, being the smallest for clay content (28.4 m) and the largest for sand (121.9 m). The former value indicated that the sampling distance was sufficient to permit evaluation of the spatial variability of soil texture in the upper part of the loess catchment. Spatial variability of organic C content was characterised by a isotropic spherical model with the autocorrelation range of 50.2 m.
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keywords:
spatial variability, soil texture, organic C, loess landscape
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original in:
Polish
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