Nature Teaching Based Upon the General Principles of Agriculture for the Use of Schools
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In our eReader you can find the full English version of the book. Read Nature Teaching Based Upon the General Principles of Agriculture for the Use of 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 Nature Teaching Based Upon the General Principles of Agriculture for the Use of Schools
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Weigh out say a dozen seeds for each pot, before sowing, and record their total weights. Allow the plants to grow, and then when they have died pull them up carefully, wash off any sawdust, and dry them thoroughly in the sun. Weigh the twelve plants from each pot, and PLANT FOOD AND MANURES 133 compare their total weight with that of the twelve seeds sown in the pot.
This experiment should teach us that plants cannot thrive very long if supplied with nothing else but water, for they are unable ...to make any use of sawdust as a food.
When plants are grown under these conditions, does it make any difference whether they are in the light or not? This experiment if carried out carefully should answer this question.
The above experiment can be usefully extended by growing some plants in sawdust with the addition of water only, others in sawdust watered with a solution containing all the essential things for plant growth, and others in ordinary good soil.
A useful plant food solution for this purpose is the following : — Calcium nitrate Potassium nitrate Magnesium nitrate Potassium phosphate Iron chloride Water .
What to read after Nature Teaching Based Upon the General Principles of Agriculture for the Use of Schools?
You can find similar books in the "Read Also" column, or choose other free books by Francis Watts to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Weigh out say a dozen seeds for each pot, before sowing, and record their total weights. Allow the plants to grow, and then when they have died pull them up carefully, wash off any sawdust, and dry them thoroughly in the sun. Weigh the twelve plants from each pot, and PLANT FOOD AND MANURES 133 compare their total weight with that of the twelve seeds sown in the pot.
This experiment should teach us that plants cannot thrive very long if supplied with nothing else but water, for they are unable ...to make any use of sawdust as a food.
When plants are grown under these conditions, does it make any difference whether they are in the light or not? This experiment if carried out carefully should answer this question.
The above experiment can be usefully extended by growing some plants in sawdust with the addition of water only, others in sawdust watered with a solution containing all the essential things for plant growth, and others in ordinary good soil.
A useful plant food solution for this purpose is the following : — Calcium nitrate Potassium nitrate Magnesium nitrate Potassium phosphate Iron chloride Water .
What to read after Nature Teaching Based Upon the General Principles of Agriculture for the Use of Schools?
You can find similar books in the "Read Also" column, or choose other free books by Francis Watts to read onlineMoreLess
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