| identifier | http://anzsoil.org/def/au/asls/soil-profile/horizons-R | ||||||
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| notation | R | ||||||
| definition | These horizons consist of continuous masses (not boulders) of moderately strong to very strong rock (excluding pans) such as bedrock. R horizons may have cracks but these are few enough and/or fine enough that few roots penetrate and there is no significant displacement of rock. It is usually too strong to dig with hand tools, even when moist. | ||||||
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