hardpan — HÁRDPAN, hardpane, s.n. Strat impermeabil pe care nu l pot străbate rădăcinile plantelor, format din hidroxizi de fier şi alţi coloizi care se precipită. – Din engl. hard pan. Trimis de gall, 13.09.2007. Sursa: DEX 98 hárdpan s. n. (sil. mf.… … Dicționar Român
Hardpan — Hard pan (h[aum]rd p[a^]n), n. The hard substratum. Same as {Hard pan}, under {Hard}, a. [1913 Webster] … The Collaborative International Dictionary of English
hardpan — [härd′pan΄] n. 1. a layer of hard soil cemented by almost insoluble materials that restrict the downward movement of water and roots 2. solid, unplowed ground ☆ 3. the hard, underlying part of anything; solid foundation … English World dictionary
Hardpan — For the geography term, a dry terminus of an internally drained basin in a dry climate (i.e. salt flat/playa), see Dry lake. In soil science, agriculture and gardening, hardpan or ouklip is a general term for a dense layer of soil, usually found… … Wikipedia
hardpan — /hahrd pan /, n. 1. any layer of firm detrital matter, as of clay, underlying soft soil. Cf. caliche, duricrust. 2. hard, unbroken ground. 3. the fundamental or basic aspect of anything; solid foundation; underlying reality: the hardpan of… … Universalium
hardpan — noun Date: 1817 1. a cemented or compacted and often clayey layer in soil that is impenetrable by roots 2. a fundamental part ; bedrock … New Collegiate Dictionary
hardpan — noun a distinct layer of soil that is largely impervious to water … Wiktionary
hardpan — a thin crust of material within a soil as a result of the illuviation of iron and/or aluminium from layers above or the precipitation of calcium carbonates which cement sands together … Geography glossary
hardpan — This develops when there are secondary calcium carbonate cementations in the lower part of the soil profile [16]. Synonym: mortar bed. See also caliche; havara; nari … Lexicon of Cave and Karst Terminology
hardpan — n. layer of clay or other solid matter; unbroken soil; solid base, strong foundation … English contemporary dictionary
