A hardened impervious layer, typically of clay, occurring in or below the soil and impairing drainage and plant growth.
（软土下面的）硬质地层，黏土层, 沙砾层
Example sentencesExamples
The stuff you find yourself in is primarily hardpan, glacial till, and some topsoil.
The simplest way to see if your soil has a hardpan or compaction layer below the surface is to take a metal rod and walk around your property sticking it into the ground.
A reader in Tucson says he plays public courses where the greenside bunkers have just a thin layer of sand over hardpan.
A hardpan or impervious layer of soil (called caliche in the Southwest's low deserts) might be the cause.
Depending on torque and speed of specific models, they can be used in conditions ranging from loose, heavy, or rocky soils to hardpan, frost, and asphalt.
Definition of hardpan in US English:
hardpan
nounˈhɑrdˌpænˈhärdˌpan
Geology
A hardened impervious layer, typically of clay, occurring in or below the soil and impairing drainage and plant growth.
（软土下面的）硬质地层，黏土层, 沙砾层
Example sentencesExamples
Depending on torque and speed of specific models, they can be used in conditions ranging from loose, heavy, or rocky soils to hardpan, frost, and asphalt.
The stuff you find yourself in is primarily hardpan, glacial till, and some topsoil.
The simplest way to see if your soil has a hardpan or compaction layer below the surface is to take a metal rod and walk around your property sticking it into the ground.
A reader in Tucson says he plays public courses where the greenside bunkers have just a thin layer of sand over hardpan.
A hardpan or impervious layer of soil (called caliche in the Southwest's low deserts) might be the cause.