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Fig. 6. Comparison of observed and predicted (a) water retention (water content 
vs. pressure head h) and (b) hydraulic conductivity (K) curves for sand, sandy loam, and clay. Observed values are represented as thick lines, while the others are lines with numbers next to the curves representing the method of prediction. The three methods for predicting n are: 1, from particle size distribution (PSD) and soil porosity 
; 2, from sand and clay content; and 3, soil texture class.
