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Fig. 4. Sensitivity of Ks to changes in organic matter (OM) content, at three levels of sand content (20, 50, 80%) and five levels of bulk density (Db) (1.0, 1.2, 1.4, 1.6, 1.8 g cm–3), estimated from three different data sets, using sand and clay content (%), Db (g cm–3), and OM content (%) as input. The range of soils is shown, for which the estimated Ks decreases when OM content is increased. Different colors designate soils with different levels of Db. (EUR–the European data set; HUN–the Hungarian data set; USA–the U.S. data set).
