| 单词 |
pedalfer |
| 释义 |
pedalfer Soil Sci.|pɪˈdælfə(r)|
[f. ped- + aluminium + L. fer-rum iron.]
A soil in which there is no layer of accumulated calcium carbonate but in which oxides of iron and aluminium have tended to accumulate (generally acidic and characteristic of humid climates). Cf. pedocal.
1928[see pedocal]. 1930L. A. Wolfanger Major Soil Divisions of U.S. iv. 100 The agriculture of the pedalfers is characterized by its wealth in crop variety and its extended development of crop centers. 1965B. T. Bunting Geogr. Soil viii. 95 Accumulation of Fe and Al oxides at depth is characteristic..of pedalfers, especially of podzols. 1972C. B. Hunt Geol. Soils viii. 167 The significant feature of pedalfers is that moisture is sufficient to wet the soil to its capacity..and to allow excess water to..remove the soluble constituents. 1977A. Hallam Planet Earth 179 These ideas were accepted in the USA, and the concepts of pedalfers and pedocals added: pedalfers are leached soils in humid areas where aluminium and iron accumulate in the B horizon.
Hence pedalˈferic a.
1928[see pedocalic a.]. 1930L. A. Wolfanger Major Soil Divisions of U.S. iv. 101 Although several of these crops are also grown in noteworthy quantity in the pedalferic zone, the chief production areas..are included within the pedocalic division. |
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