©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 2 Andisols—a Typic Melanudand from western Tanzania. Scale in 10 cm.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 10 Spodosols—a Humic Cryorthod from southern Quebec. Albic horizon at about 10 cm. Bar = 10 cm.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 11 Ultisols—a Typic Hapludult from central Virginia showing metamorphic rock structure in the saprolite below the 60-cm-long shovel.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 13 Typic Argiustolls in eastern Montana with a chalky white calcic horizon (Bk and Ck) overlain by a Mollic epipedon (Ap, A2, and Bt).

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 15 A Typic Plinthudult in central Sri Lanka. Mottled zone is plinthite, in which ferric iron concentrations will harden irreversibly if allowed to dry.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 16 A soil catena or toposequence in central Zimbabwe. Redder colors indicate better internal drainage. Inset: B-horizon clods from each soil in the catena.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 17 Uneven water infiltration and movement in a sandy soil due to hydrophobic organic coatings.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 18 The darker surface soil was brushed aside to expose a hydrophobic layer caused by burning the chaparral vegetation. Water beads up rather than soaking into this layer. See page 300.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 19 The boundary between the Oe and the E horizons of a forested Ultisol.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 20 The effect of moisture on soil color. Right side of this Mollisol profile was sprayed with water.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 21 Effect of poor drainage on soil color. Gray colors and red redox concentrations in the B horizons of a Plinthaquic Paleudalf.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 22 The 10YR hue page of a Munsell color book. The standard notation is handwritten for the color with hue 10YR, value 5, and chroma 6.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 23 Road cut in southern Brazil exposing the profile of an Udalf with a sombric horizon. Humid, high-altitude tropical and subtropical mountains are the typical environments for the formation of this dark, humus-rich subsurface horizon.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 24 Thick clay skins or argillans in an argillic Bt horizon. Image made from a very thin, polished slice of soil, magnified with a petrographic microscope using plain polarized light (left) and cross-polarized light (right). Note the thin layers of illuvial clay.

©2002 Pearson Education, Inc. Upper Saddle River, New Jersey THE NATURE AND PROPERTIES OF SOILS, 13/e Nyle C. Brady and Ray R. Weil Plate 25 Connecticut River valley in western Massachusetts. Note variable alluvial soils and presence of riparian forest buffer along the river bank.