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Effect of Water Regime on Aggregate-tensile Strength, Rupture Energy, and Friability

^a Dep. of Crop Physiology and Soil Science, Danish Institute of Agricultural Sciences, Research Centre Foulum, P.O. Box 50, DK-8830 Tjele, Denmark
^b Dep. of Land Resource Science, Univ. of Guelph, Guelph, ON, Canada N1G 2W1

View larger version (23K): [in a new window]   Fig. 1. (a) Aggregate tensile strength, Y, and (b) specific rupture energy, Esp, for 8- to 16-mm aggregates as a function of pressure potential for the Exp. 1 and 2 soils. Lines are linear regression lines except for the Esp data from Exp. 2.

View larger version (18K): [in a new window]   Fig. 2. The relationship between stress and strain (Young's modulus), Y/, as a function of pressure potential for the Exp. 2 soils. Bars indicate ± 1 standard error of mean.

View larger version (25K): [in a new window]   Fig. 3. Friability indices, kY and kE as a function of pressure potential for the Exp. 1 soils (a) and the Exp. 2 soils (b). Bars indicate ± 1 standard error of mean.

View larger version (12K): [in a new window]   Fig. 4. The relationship between the friability indices, kY and kE (all data included).