 | 1840 - 718 pagine
...Professor Liebig believes that the chief influence exercised by humus on vegetation arises from its being " a continued source of carbonic acid, which...atmosphere of carbonic acid is, therefore, contained in every fertile soil, and is the first and most important food for the young plants which grow in... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - 1840 - 420 pagine
...permeable to air as in the air itself; it is a continued source of carbonic acid, which it emits very slowly. An atmosphere of carbonic acid, formed at...particle of decaying humus. The cultivation of land, by tilling and loosening the soil, causes a free and unobstructed access of air. An atmosphere of carbonic... | |
 | 1841 - 274 pagine
...perinc'able to air as in tuo air itself; it is ft continued source of carbonic acid, which it emit* very slo-wly. An atmosphere of carbonic acid formed at...oxygen of the air surrounds every particle of decaying huniu*. The cultivation of laud by tilling and loosening the soil, causes a free ami unobstructed access... | |
 | 1841 - 276 pagine
...continued source of carbonic acid, which it emin very slowly. An atmosphere of carbonic acid farmed at the expense of the oxygen of the air surrounds every particle of decaying hmuus. The cultivation of land by tilling and loosening the soil, causes a tree nnd unobstructed access... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - 1842 - 450 pagine
...permeable to air as in the air itself; it is a continued source of carbonic acid, which it emits very slowly. An atmosphere of carbonic acid, formed at...particle of decaying humus. The cultivation of land, by tilling and loosening the soil, causes a free and unobstructed access of air. An atmosphere of carbonic... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - 1843 - 446 pagine
...permeable to air as in the air itself; it is a continued source of carbonic acid, which it emits very slowly. An atmosphere of carbonic acid, formed at...particle of decaying humus. The cultivation of land, by tilling and loosening the soil, causes a free and unobstructed access of air. An atmosphere of carbonic... | |
 | 1843 - 770 pagine
...permeable to air as in the air itself; it is a continued source of carbonic acid, which it emits very slowly. An atmosphere of carbonic acid, formed at...particle of decaying humus. The cultivation of land, by tilling and loosening the soil, causes a free and unobstructed access of air. An atmosphere of carbonic... | |
 | Justus Freiherr von Liebig, Lyon Playfair Baron Playfair - 1843 - 260 pagine
...permeable to air as in the air itself; it is a continued source of carbonic acid, which it emits very slowly. An atmosphere of carbonic acid, formed at the expense of the air, surrounds every particle of decaying humus. The cultivation of land, by tilling and loosening... | |
 | 1845 - 424 pagine
...permeable to air as in the air itself; it is a continued source of carbonic acid, which it emits very slowly. An atmosphere of carbonic acid, formed at...particle of decaying humus. The cultivation of land, by tilling and loosening the soil, causes a free and unobstructed access of air. An atmosphere of carbonic... | |
 | Philip Lovell Phillips - 1845 - 126 pagine
...in the same way as in the air itself; it is a continued source of carbonic acid which it emits very slowly. An atmosphere of carbonic acid, formed at...every particle of decaying humus. The cultivation of the land by tilling and loosening the soil, causes a free and unobstructed access of air. An atmosphere... | |
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Humus acts in the same manner in a soil permeable to air as in the air itself; it is a continued source of carbonic acid, which it emits very slowly. An atmosphere of carbonic acid, formed at the expense of the oxygen of the air, surrounds every particle... 
