A Textbook of Botany for Colleges
A Textbook of Botany for Colleges
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In our eReader you can find the full English version of the book. Read A Textbook of Botany for Colleges Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Textbook of Botany for Colleges
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This MYCORHiZA, as it is named, ab- sorbs water and mineral matters which it transmits to the roots ; and there is some reason to be- Ueve that it also absorbs solu- ble organic matters set free in decay of the humus but useful again to the plants. The associa- tion seems clearly beneficial both to fungus and flowering plant; and accordingly we have here one of the cases where two dif- ferent organisms derive benefit from their association, a condi- tion called SYMBIOSIS. Some kinds of soil Pun...gi seem also to have the same powers as Bacteria, next described, in relation to soil nitrogen.
Bacteria, already known to the student as the smallest and simplest of living organisms, are abundant and of many kinds in all soils ; but the most important are those which effect NITRIFICATION and NITROGEN FIXATION. Nitrogen, a con- stituent of the protoplasm, is one of the substances most indispensable to plants; but although it composes four fifths of the atmosphere, the higher plants are unable to take it from that source, and have to rely upon compounds ab- sorbed in solution through the roots.
What to read after A Textbook of Botany for Colleges?
You can find similar books in the "Read Also" column, or choose other free books by William Francis Ganong to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
This MYCORHiZA, as it is named, ab- sorbs water and mineral matters which it transmits to the roots ; and there is some reason to be- Ueve that it also absorbs solu- ble organic matters set free in decay of the humus but useful again to the plants. The associa- tion seems clearly beneficial both to fungus and flowering plant; and accordingly we have here one of the cases where two dif- ferent organisms derive benefit from their association, a condi- tion called SYMBIOSIS. Some kinds of soil Pun...gi seem also to have the same powers as Bacteria, next described, in relation to soil nitrogen.
Bacteria, already known to the student as the smallest and simplest of living organisms, are abundant and of many kinds in all soils ; but the most important are those which effect NITRIFICATION and NITROGEN FIXATION. Nitrogen, a con- stituent of the protoplasm, is one of the substances most indispensable to plants; but although it composes four fifths of the atmosphere, the higher plants are unable to take it from that source, and have to rely upon compounds ab- sorbed in solution through the roots.
What to read after A Textbook of Botany for Colleges?
You can find similar books in the "Read Also" column, or choose other free books by William Francis Ganong to read onlineMoreLess
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