 | Agriculture - 1842 - 1036 pages
...importance of the phosphates to vegetables and animals, and the danger of their excess to the latter. " Thousands of years have been necessary to convert...of arable land and thousands of years more will be necessary for their complete reduction, that is, for the complete exhaustion of their alkalies. We... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - Agricultural chemistry - 1840 - 420 pages
...lava cannot possibly, on account of its origin, contain the smallest trace of vegetable matter, and L yet it is well known, that when the volcanic ashes...is for the complete exhaustion of their alkalies. We see from the composition of the water in rivers, streamlets, and springs, how little rain-water... | |
 | Justus Freiherr von Liebig - Agricultural chemistry - 1841 - 468 pages
...moisture. The land in the vicinity of Vesuvius may be considered as the type of a fertile soil, and its 17 fertility is greater or less in different parts, according...is, for the complete exhaustion of their alkalies. We see from the composition of the water in rivers, streamlets, and springs, how little rain-water... | |
 | Daniel Kimball Whitaker, Milton Clapp, William Gilmore Simms, James Henley Thornwell - 1854 - 588 pages
...sand in such proportion as to give free access to air and moisture." The land in the vicinity of Mount Vesuvius may be considered as the type of a fertile...of arable land, and thousands of years more will be required for their perfect reduction — that is, for the complete exhaustion of their alkalies. Air,... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - Agricultural chemistry - 1842 - 450 pages
...exposed for some time to the influence of air and moisture, a soil is gradually formed in which all 13* kinds of plants grow with the greatest luxuriance....is, for the complete exhaustion of their alkalies. We see from the composition of the water in rivers, streamlets, and springs, how little rain-water... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - Agricultural chemistry - 1842 - 450 pages
...greatest luxuriance. This fertility is owing to the alkalies which are contained in the lava, and which hy exposure to the weather are rendered capable of being...is, for the complete exhaustion of their alkalies. We see from the composition of the water in rivers, streamlets, and springs, how little rain-water... | |
 | Justus Freiherr von Liebig - Agricultural chemistry - 1843 - 446 pages
...disintegrated minerals with chalk and sand in such a proportion as to give free access to air and moisture. The land in the vicinity of Vesuvius may be considered...is, for the complete exhaustion of their alkalies. We see from the composition of the water in rivers, streamlets, and springs, how little rain-water... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - Agricultural chemistry - 1843 - 446 pages
...luxuriance. This fertility of lava is owing to the alkalies, alkaline earths, and silica, contained in it, which by exposure to the weather are rendered capable...is, for the complete exhaustion of their alkalies. lets, and springs, how little alkali the rain-water is able to extract from a soil, even after a term... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - Agricultural chemistry - 1843 - 260 pages
...by exposure to the weather are rendered capable of being absorbed by plants. Thousands of years nave been necessary to convert stones and rocks into the...is, for the complete exhaustion of their alkalies. We see from the composition of the water in rivers, streamlets, and springs, how little rain-water... | |
 | George Cox (Optician) - Agricultural chemistry - 1844 - 152 pages
...is, that of its invariably containing alkalies and alkaline earths, with sulphates and phosphates, " Thousands of years have been necessary to convert...of arable land, and thousands of years more will be required for their perfect reduction, that is, for the complete exhaustion, of their alkalies." The... | |
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This fertility is owing to the alkalies which are contained in the lava, and which by exposure to the weather are rendered capable of being absorbed by plants. Thousands of years have been necessary to convert stones and rocks into the soil of arable... 
