 | Sir Humphry Davy, George Sinclair, John Russell Duke of Bedford - Agricultural chemistry - 1815 - 452 pages
...winters is usually very much below the freezing point ; and this water becomes the first nour~ ishment of the plant in early spring. The expansion of water...its congelation, at which time its volume increases tV, and its contraction of bulk during a thaw, tend to pulverise the soil ; to separate its parts from... | |
 | John Claudius Loudon - 1825 - 1250 pages
...pastures, hedges, and ornamental plantations. SXCT. III. Of Waler. 3264. JPater ii nbtoluie/y necenary to the economy of vegetation in its elastic and fluid...its congelation, at which time its volume increases one twelfth, and its contraction of bulk during a thaw, tend to pulverise the soil, to separate its... | |
 | John Claudius Loudon - Agriculture - 1826 - 1252 pages
...heat ; and when the ground is covered with snow, or the surface of the soil or of water is frozen, die roots or bulbs of the plants beneath are protected...its congelation, at which time its volume increases one twelfth, and its contraction of bulk during a thaw, tend to pulverise the soil, to separate its... | |
 | John Claudius Loudon - Agriculture - 1831 - 1330 pages
...2331. Water is absolutely necessary to the economy of vegetation in its elastic and fluid states ; and it is not devoid of use even in its solid form....its congelation, at which time its volume increases one twelfth, and its contraction of bulk during a thaw, tend to pulverise the soil, to separate its... | |
 | William Whewell - Astronomy - 1833 - 416 pages
...ground is covered with snow, or the surface of the soil or of water is frozen, the roots or bulbs of plants beneath are protected by the congealed water...volume increases one-twelfth, and its contraction in bulk during a thaw, tend to pulverize the soil, to separate its parts from each other, and to make... | |
 | William Whewell - Astronomy - 1833 - 298 pages
...ground is covered with snow, or the surface of the soil or of water is frozen, the roots or bulbs of plants beneath are protected by the congealed water...its volume increases onetwelfth, and its contraction in bulk during a thaw, tend to pulverize the soil, to separate its parts from each other, and to make... | |
 | John Claudius Loudon - Arboriculture - 1835 - 1326 pages
...1993. Water is absolutely necessary to lite economy of vegetation in its elastic and fluid states ; and it is not devoid of use even in its solid form....its congelation, at which time its volume increases one twelfth, and its contraction of bulk during a thaw, tend to pulverise the soil, to separate its... | |
 | Sir Humphry Davy - Agricultural chemistry - 1836 - 458 pages
...necessary to the economy of vegetation in its elastic and fluid state ; and it is not devoid of use even it its solid form. Snow and ice are bad conductors of...its congelation, at which time its volume increases i1?, and its contraction of bulk during a thaw, tend to pulverise the soil ; to separate its parts... | |
 | Natural theology - 1836 - 566 pages
...ground is covered with snow, or the surface of the soil or of water is frozen, the roots or . bulbs of plants beneath are protected by the congealed water...volume increases one-twelfth, and its contraction in bulk during a thaw, tend to pulverize the soil, to separate its parts from each other, and to make... | |
 | Jean-Antoine-Claude Chaptal (comte de Chanteloup) - Agricultural chemistry - 1839 - 372 pages
...of the atmospheric fluid ; and its density to that of the atmosphere being as ten to fifteen, it * Water is absolutely necessary to the economy of vegetation...its congelation, at which time its volume increases one twelfth, and its contraction of bulk during a thaw, tend to pulverise the soil ; to separate its... | |
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Snow and ice are bad conductors of heat ; and when the ground is covered with snow, or the surface of the soil or of water is frozen, the roots or bulbs of the plants beneath are protected by the congealed water from the influence of the atmosphere, the... 
