...throughout the world, so far as it was known, clearly show that a fertile soil is one which had accumu]ated within it the residue of ages of previous vegetation ; and that it had become infertile as this residue was exhausted. V. THE GEOGNOSY OF CRYSTALLINE EOCKS.* BY T. STERRY...

...ascertained in our own and in other investigations, but the history of agriculture throughout the world, so far as we know it, clearly show that a fertile...of ages of previous vegetation, and that it becomes infertile as this residue is exhausted ; and enormous as are the accumulations in the prairie lands...

...waste of fertility. It may not be out of place to append the opinion of the Rothamsted investigators, that a fertile soil is one which has accumulated within...of ages of previous vegetation, and that it becomes infertile as this residue is exhausted." The prairie is for the most part an unbroken expanse of herbage,...

...the unique series of investigations which have for so many years been in progress at Rothamsted is that a fertile soil is one which has accumulated within...of ages of previous vegetation, and that it becomes infertile as this residue is exhausted. The history of agriculture throughout the world equally points...

...before, that — " The history of agriculture throughout the world, so far as it is known, clearly shows that a fertile soil is one which has accumulated within...of ages of previous vegetation, and that it becomes infertile as this residue is exhausted." In conclusion, we would call attention to the fact, that in...

.... . the history of agriculture throughout the world, so far as it is known clearly, shows that the fertile soil is one which has accumulated within it...of ages of previous vegetation, and that it becomes infertile as this residue is exhausted." As to the action of micro-organisms in providing nitrogen...

...world, so far as it is known, clearly show that, pre-eminently so far as the nitrogen is concerned, a fertile soil is one which has accumulated within it the residue of ages of natural vegetation, and that it becomes infertile as this residue is exhausted. LONDON : HARBISON'...

...ascertained in our own and in other investigations, but the history of agriculture throughout the world, so far as we know it, clearly show that a fertile...of ages of previous vegetation, and that it becomes infertile as this residue is exhausted ; and enormous as are the accumulations in the prairie lands...

...and in other investigations, but the history of agriculture throughout the world, so far as is known, clearly show that a fertile soil is one which has accumulated within it the residue of long periods of previous vegetation; and that it becomes infertile as this residue is exhausted." Though...