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Published online 23 May 2006
Published in Soil Sci Soc Am J 70:1071-1081 (2006)
DOI: 10.2136/sssaj2005.0177
© 2006 Soil Science Society of America
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Geostatistical Tools for Characterizing the Spatial Variability of Soil Water Repellency Parameters in a Laurel Forest Watershed

C. M. Regaladoa,* and A. Ritterb

a Instituto Canario de Investigaciones Agrarias (ICIA), Dep. Suelos y Riegos, Apdo. 60 La Laguna, 38200 Tenerife, Spain
b Dep. Ingeniería, Producción y Economía Agrarias, ICIA and Univ. de La Laguna Ctra. Geneto, 2 La Laguna, 38200 S/C Tenerife, Spain


Figure 1
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  		Fig. 1. Watershed selected for soil sampling. (a) 3-D view; (b) rectangular grid (100 by 75 m); (c) grid at centimeter scale in the four points marked with squares in (b).

 

Figure 2
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  		Fig. 2. Example of repellency curve, indicating the parameters selected for its study.

 

Figure 3
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  		Fig. 3. Plots of local variances vs. local means computed from 150 by 300 m moving overlapping windows for the water repellency parameters and SOM.

 

Figure 4
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  		Fig. 4. Experimental and fitted omnidirectional correlograms at meter scale.

 

Figure 5
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  		Fig. 5. Experimental and fitted omnidirectional correlograms at centimeter scale.

 

Figure 6
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  		Fig. 6. Fractal omnidirectional semivariograms for S and SOM.

 

Figure 7
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  		Fig. 7. Kriging maps for the water repellency parameters and SOM.

 




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