hard pan
Also found in: Dictionary, Acronyms.
Also found in: Dictionary, Acronyms.
References in periodicals archive
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The presence of hard pan created due to repeated tillage practices at same depth had adverse effect on crop yield which may be removed through deep ploughing.
Most roots grow away from inhospitable areas such as a construction-compacted or natural hard pan.
The second site sampled on Hackberry Creek was located upstream from the cattle activity and had vegetated banks, clear water, and a hard pan clay substrate with occasional small sandbars.
For soft to medium rock, shale, hard pan and caliched ground conditions up to 10,000 psi, use the Gauntlet bit.
The other unfortunate side effect of rotovation is that the plot eventually develops a hard pan just below the four inch depth that the tines usually get down to, and as a result, the drainage goes to pot as well
Neither is a rotavator a good enough substitute for spade or fork, because besides cultivating the soil to little more than six inches, it eventually creates a hard pan, and, consequently, a waterlogged soil.
If it's getting wetter gardeners need to focus on improving drainage, especially on clay soils or where it is suspected a hard pan has been allowed to build up a foot or so beneath the surface because cultivation has previously been neglected.
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