Botany All the Year Round a Practical Text book for Schools
Botany All the Year Round a Practical Text book for Schools
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In our eReader you can find the full English version of the book. Read Botany All the Year Round a Practical Text book for Schools 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 Botany All the Year Round a Practical Text book for Schools
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Some of the pea family, however, bear on their roots little tubers formed by minute organisms called bacteria, which have the power of ex- tracting nitrogen directly from the free air mingled with the soil ; and hence, wherever these tuber-bearing legumes are present the soil is found to be enriched with nitrogen in a form ready for use.
1 4 ROOTS AND UNDERGROUND STEMS Plants also obtain their supply of the various mineral salts needed by them from solutions in the soil water which they absorb ...through their roots. Different species, and even different varieties of the same species, absorb these substances in very different proportions, and upon this fact, much more than upon the form of roots (Sec. 173), depends the principle of the rotation of crops in farming.
199. Plants can not choose their Food. Substances are often found in plants which appear to be useless, and some, as zinc and lead, which are positively harmful. This shows that the roots are not able to choose their own nourishment, but absorb whatever is present in the soil in soluble form and can penetrate their cell walls.
What to read after Botany All the Year Round a Practical Text book for Schools?
You can find similar books in the "Read Also" column, or choose other free books by Eliza Frances Andrews to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Some of the pea family, however, bear on their roots little tubers formed by minute organisms called bacteria, which have the power of ex- tracting nitrogen directly from the free air mingled with the soil ; and hence, wherever these tuber-bearing legumes are present the soil is found to be enriched with nitrogen in a form ready for use.
1 4 ROOTS AND UNDERGROUND STEMS Plants also obtain their supply of the various mineral salts needed by them from solutions in the soil water which they absorb ...through their roots. Different species, and even different varieties of the same species, absorb these substances in very different proportions, and upon this fact, much more than upon the form of roots (Sec. 173), depends the principle of the rotation of crops in farming.
199. Plants can not choose their Food. Substances are often found in plants which appear to be useless, and some, as zinc and lead, which are positively harmful. This shows that the roots are not able to choose their own nourishment, but absorb whatever is present in the soil in soluble form and can penetrate their cell walls.
What to read after Botany All the Year Round a Practical Text book for Schools?
You can find similar books in the "Read Also" column, or choose other free books by Eliza Frances Andrews to read onlineMoreLess
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