APES Soils Set 01 Flashcards
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| 8854992487 | O | Surface litter layer | 0 | |
| 8854992488 | A | Topsoil; contains humus | 1 | |
| 8854992489 | E | Zone of leaching | 2 | |
| 8854992490 | B | Subsoil | 3 | |
| 8854995011 | C | contains parent material | 4 | |
| 8855005024 | Humus | decomposing organic material in the soil | 5 | |
| 8855020974 | Parent material | unweathered bedrock | 6 | |
| 8855028066 | Immature soil | bedrock near the surface; few horizons | 7 | |
| 8855032867 | Mature soil | many horizons; bedrock is located far below the topsoil | 8 | |
| 8855049417 | Coniferous forest soil | acidic due to shed needles | 9 | |
| 8855820386 | Grassland soil | thick, humus-rich soil; alkaline | 10 | |
| 8855853294 | Tropical rain forest soil | nutrient-poor acidic soil | 11 |