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hardpan
hardpan
hardpan A hardened soil
horizon, usually found in the middle or lower parts of the
profile, that may be indurated (see
INDURATION) or cemented by a variety of possible cementing materials. See also
CALICHE;
DURICRUST; and
PAN.
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Assessment of spatial variability of penetration resistance and hardpan characteristics in a cassava field.(Report)
Magazine article from: Australian Journal of Soil Research; 5/1/2008; ; 700+ words
; ...layer is referred as plow pan or hardpan (Raper et al. 2005). Tillage...the field can cause plow pans or hardpans. Hardpans and tillage pans reduce...deep tillage to break through the hardpan layer, which allows crop roots to...
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Digging Out of `Hardpan' Lie `Offers Little Room for Error'
Newspaper article from: The Washington Post; 8/2/1998; ; 677 words
; ...burned out. Poor shots often leave the ball resting not on grass, but on bare dirt, in what golfers call a tight, or "hardpan," lie. "A tight lie offers little room for error," said Dean Wilson, the head professional at Swan Point Golf Club...
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 "Courier News (Elgin, IL)")
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Some plants actually thrive in hardpan lawns
Newspaper article from: Courier News (Elgin, IL); 4/11/2007; ; 700+ words
; Call it hardpan or caliche or adobe, but all these soils add up to dense ground. And water doesn't penetrate any better than it seeps through...
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Pitching from hardpan
Newspaper article from: The Malay Mail; 10/6/1999; 700+ words
; GOLFERS HELPDESK Dear Murray, Longer shafts in my woods seem to do what they are supposed to do (longer drives) but I wonder, do longer shafts in the irons work the same way? I have a set of longer- shafted irons and I don't hit them very well. Why is this? Alfred Chin (KL) Dear Alfred, There is no
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Analysis of phosphate deposit "disturbances" using the horizontal-gradient responses of resistivity data (Oulad Abdoun, Morocco).
Magazine article from: Earth Sciences Research Journal; 12/1/2005; ; 700+ words
; ...was exhausted. Inclusions of sterile hardpan--so-called "disturbances"--are...layers of calcareous and argillaceous hardpan. In this field, extraction was begun...inclusions and lenses of extremely tough hardpan locally known as "derangements" or disturbances...
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Development of chemical caps in acid rock drainage environments
Magazine article from: Mining Engineering; 6/1/1997; ; 700+ words
; ...oxyhydroxide at the surface. The hardpan layer significantly reduced...should be possible to create hardpan layers as chemical caps to...In natural environments, hardpans have been observed to precipitate...to create a self-sealing hardpan within the upper parts of columns...
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 "Telegram & Gazette (Worcester, MA)")
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Crabgrass, bluegrass are foes of lawnowners.(LIVING)
Newspaper article from: Telegram & Gazette (Worcester, MA); 9/4/2008; 700+ words
; ...plantains may indicate a compacted soil layer or hardpan beneath the lawn. Often, the hardpan is only four inches below the ground surface...because their deep taproots penetrate through the hardpan to the soil down below. Plantains grow above...
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Ponds, Pumps And Sand.
Magazine article from: Dixie Contractor; 3/20/2006; 700+ words
; ...feet of the site -- down to a layer of hardpan -- to allow excavation of the lake...tap a deposit of sand that lay below the hardpan. The goal was to get sand for use in...west to east and took advantage of the hardpan to provide a solid surface on which to...
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 "Albany Times Union (Albany, NY)")
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TAKE TIME TO ROOT OUT POOR SOIL.(AT HOME)
Newspaper article from: Albany Times Union (Albany, NY); 4/14/2002; 700+ words
; ...gravity to sweep away excess water. Hardpan Any packed-down subsoil through which...and water cannot percolate is called hardpan. To deal with this kind of soil, moisten the top 2 feet of hardpan (and any topsoil), wait a week, loosen...
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Field Notes.
Magazine article from: Farm Journal; 10/30/2005; ; 700+ words
; ...consider. Our soils also have a natural hardpan usually 18" to 20" deep. Studies...district staff suggest breaking up that hardpan will pay. They use a Brillion Zone Commander to break through the hardpan and then plant over the slots. The...
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hardpan
Book article from: A Dictionary of Plant Sciences
hardpan A hardened soil horizon , usually found in the middle or lower parts of the profile , that may be indurated (see INDURATION ) or cemented by a variety of possible cementing materials. See also CALICHE ; DURICRUST ; and PAN .
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Horizon
Encyclopedia entry from: The Gale Encyclopedia of Science
...often compacted by vehicles), or a hardpan (cemented by minerals). In arid climates...minerals upward. This accumulation creates a hardpan impenetrable to any rain percolating...evaporated pools or rapid runoff. If the hardpan is composed of the calcium-rich mineral...
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plow
Book article from: The Columbia Encyclopedia, Sixth Edition
...with the soil; and the chisel plow, with points mounted on long shanks to loosen hard, dry soils and shatter subsurface hardpan. The plow often symbolizes agriculture, as in the great seals of New Jersey, Pennsylvania, Tennessee, and other states...
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induration
Book article from: A Dictionary of Plant Sciences
induration A process of forming indurated horizons or hardpans that have a high bulk density and are hard or brittle. Cementing materials may be present and responsible for the induration.
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plinthite
Book article from: A Dictionary of Ecology
...proportion of iron and aluminium oxides, clay , and quartz, which has developed through a combination of leaching and gleying (see gley ) in well-weathered tropical soils. On drying, plinthite changes irreversibly to an ironstone hardpan .
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