| The amount of pore space in a hardpan is much less than the layers of soil above or below it, thus causing drainage problems. |
| Which building block of the ecosystem is one acting upon if one breaks up the hardpan crust? |
| For hardpan, shale, loose rock and similar materials, ample strength of teeth and dipper is of greater importance than its shape. |
| The stuff you find yourself in is primarily hardpan, glacial till, and some topsoil. |
| Deep tillage implements, used chiefly to break up hardpan and packed soils, include the subsoiler and the chisel plow. |
| A reader in Tucson says he plays public courses where the greenside bunkers have just a thin layer of sand over hardpan. |
