. Elements of ecology. Ecology. Soil-Group Divisions 85 and the pedalfers, in the terminology used by Wolfanger (1950) and shown in Fig. —or the aridic and the humid soils, in the some- what different classification used by Lyon, Buckman, and Brady (1952). The pedocal division is composed of incompletely leached soils found characteristically in the arid Great Plains of the West. The slight rainfall of these regions does not saturate the soil to a depth sufficient to reach the water table deep in the ground, and lime tends to be deposited in the B horizon. When evaporation from the soil be
. Elements of ecology. Ecology. Soil-Group Divisions 85 and the pedalfers, in the terminology used by Wolfanger (1950) and shown in Fig. —or the aridic and the humid soils, in the some- what different classification used by Lyon, Buckman, and Brady (1952). The pedocal division is composed of incompletely leached soils found characteristically in the arid Great Plains of the West. The slight rainfall of these regions does not saturate the soil to a depth sufficient to reach the water table deep in the ground, and lime tends to be deposited in the B horizon. When evaporation from the soil begins, the ground water is drawn upward again toward the surface, carrying some of the solubles with it. The water in this kind of soil has been said to be "hung from the top, like Monday's wash!" The roots of the grasses and shrubs that are characteristic of the pedocal soils absorb the water and the contained salts and also carry them to- ward the surface. Grasses particularly tend to absorb a considerable amount of calcium and to restore this material to the upper layers. This process is aided by the low growth habit of these plants and the great development of rhizomes and other structures near the surface. PEDOCALS ^^ BUCKERTHS 'M'^'i DARK-BROWNERTHS ^''"' i BROWNERTHS N^ GRAYERTHS PEDALFERS ( J GRAY BROWNERTHS ^^ RED-AND-YELLOWERTHS ^^ PRAIRYERTHS llllllllll PODZOLS lijliljiiil UNDIFFERENTIATED HIGHLANDS |v-:;-:| SANDHILLS Fig. The soil groups of the United States and their division into Pedocals and Pedalfers. (Modified from Wolfanger, 1950, in Conservation of Natural Re- sources, reprinted with permission of John Wiley and Sons.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Clarke, George L. (George Leonard), 1905-. New York, Wiley
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Keywords: ., bookcentury1900, bookpublishernewyorkwiley, booksubjectecology
