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Susceptibility to Compaction, Load Support Capacity, and Soil Compressibility of Hapludox

^a Universidad Nacional del Litoral, Facultad de Ciencias Agrarias, 86– Kreder 2805– S 3080 HOF, Esperanza (Sta Fe), Argentina
^b Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Depto. De Solos e Nutricão de Plantas, Av. Padua Dias 11, Caixa Postal 09, CEP: 13418-900, Piracicaba (SP), Brazil
^c Dep. of Land Resource Science, Univ. of Guelph, Guelph, ON N1G 2W1, Canada

View larger version (12K): [in a new window]   Fig. 1. Soil compression curve showing the compression index (Cc), and the method used to determine the preconsolidaton pressure (p).

View larger version (15K): [in a new window]   Fig. 2. Compression index (Cc) versus clay content for soils classified as sandy Typic Hapludox, loamy Typic Hapludox, and clayey Rhodic Hapludox.

View larger version (39K): [in a new window]   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 (wfc = 0.20 kg kg–1), one standard deviation above wfc (w = 0.26 kg kg–1), and one standard deviation below wfc (w = 0.14 kg kg–1).

View larger version (22K): [in a new window]   Fig. 4. Estimated and measured compression curves for a sandy Typic Hapludox and a clayey Rhodic Hapludox. The ln values calculated from Eq. [1] were transformed to values before doing the graph, and values are given in linear scale.

View larger version (82K): [in a new window]   Fig. 5. Bulk density estimated using Eq. [1] as a function of the initial bulk density (i) and the pressure applied to the soil ().