 ... gradually formed in which all kinds of plants grow with the greatest luxuriance. 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...  Report of the Secretary of Agriculture ... - Page 23by United States. Department of Agriculture - 1865Full view - About this book
 | 1842 - 1036 pages
...the danger of their excess to the latter. " Thousands of years have been necessary to convert stones and rocks into the soil 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 - 1840 - 420 pages
...rendered capable of being absorbed by plants. Thousands of years have been necessary to convert stones and rocks into the soil of arable land, and thousands of years more will be requisite for their perfect reduction, that is for the complete exhaustion of their alkalies. We see... | |
 | Daniel Kimball Whitaker, Milton Clapp, William Gilmore Simms, James Henley Thornwell - 1854 - 588 pages
...rendered capable of being absorbed by plants. Thousands of years have been necessary to convert stones and rocks into the soil 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, water, and the change... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - 1842 - 450 pages
...rendered capable of being absorbed by plants. Thousands of years have been necessary to convert stones and rocks into the soil of arable land, and thousands of years more will be requisite for their perfect reduction, that is, for the complete exhaustion of their alkalies. We see... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - 1843 - 446 pages
...rendered capable of being absorbed by plants. Thousands of years have been necessary to convert stones and rocks into the soil of arable land, and thousands of years more will be requisite for their perfect reduction, that is, for the complete exhaustion of their alkalies. lets,... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - 1843 - 260 pages
...rendered capable of being absorbed by plants. Thousands of years nave been necessary to convert stones and rocks into the soil of arable land, and thousands of years more will be requisite for their perfect reduction, that is, for the complete exhaustion of their alkalies. We see... | |
 | George Cox (Optician) - 1844 - 152 pages
...alkaline earths, with sulphates and phosphates, " Thousands of years have been necessary to convert stones and rocks into the soil 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 cause of the fertility... | |
 | Henry Colman - 1844 - 572 pages
...rendered capable of being absorbed by plants. Thousands of years have been necessary to convert stones and rocks into the soil of arable land ; and thousands of years more will be requisite for their perfect reduction — that is, for the complete exhaustion of their alkalies."... | |
 | Henry Colman - 1851 - 528 pages
...rendered capable of being absorbed by plants. Thousands of years have been necessary to convert stones and rocks into the soil of arable land ; and thousands of years more will be requisite for their perfect reduction — that is, for the complete exhaustion of their alkalies."... | |
 | United States. Patent Office - 1852 - 534 pages
...rendered capable of being absorbed by plants. Thousands of years have been necessary to convert stones and rocks into the soil of arable land, and thousands of years more will be required for their perfect reduction — that is, for the complete exhaustion of iheir alkalies. Air, water, arid the... | |
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