Fig. 3. Preconsolidation pressure (_p) as a function of clay content and initial bulk density (_i) for three water contents: field capacity gravimetric water content (w_fc = 0.20 kg kg^–1), one standard deviation above w_fc (w = 0.26 kg kg^–1), and one standard deviation below w_fc (w = 0.14 kg kg^–1).