| Similarly, soils in a chronosequence developed on alluvium can exhibit a clayey hardpan after 100,000 years or so. |
| A reader in Tucson says he plays public courses where the greenside bunkers have just a thin layer of sand over hardpan. |
| The stuff you find yourself in is primarily hardpan, glacial till, and some topsoil. |
| Elsewhere the hardpan or bedrock must have been exceptionally level and near the top of the ground. |
| Which building block of the ecosystem is one acting upon if one breaks up the hardpan crust? |
| Deep tillage implements, used chiefly to break up hardpan and packed soils, include the subsoiler and the chisel plow. |
