Elements of Practical Agriculture
by David Low
Format: Paperback
ISBN13: 9780217710459
Paperback|9780217710459
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Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: III. THE PROPERTIES OF SOILS AS DETERMINED BY THEIR VEGETABLE PRODUCTIONS. When we regard the distribution of plants in different regions, we perceive that this is determined by causes which have little relation to the nature of the soil on which the plants grow. The soils of all countries are, in their essential characters, alike. The same mineral masses, composed of the same substances, exist over all the world, and yield, by their disintegration or decomposition, the same materials for the forming of soils. But, although the mineral matter of the soils of all countries is thus similar in its constituent parts, it is altogether different with the vegetation by which these soils are characterized. Every zone, from the equator to the polar circle, is distinguished by a different vegetation, and different regions have their peculiar plants. A district of granite, of sandstone, or trap, in southern Asia, will yield the same materials for forming soils as similar districts in northern Europe, while the vegetation produced will scarcely seem to possess any common character. Amongst the natural causes which affect the vegetation of countries, the influence of temperature is that which is the most obvious to the senses. When we pass from a warm country to a cold, we perceive a change in the whole character of the vegetation. We cannot ascend a mountain without finding such a change in the kinds of plants produced, and in the vigour with which they grow, dependent upon the change of temperature. The degree of moisture, too, the distance or proximity of the sea, and other circumstances connected with the climate and physical condition of the country, affect the nature of its vegetable productions, and show, that the influence of soil, with respect to the kinds of plants produced, ..
| ISBN-13 | 9780217710459 |
|---|---|
| ISBN-10 | 021771045X |
| Weight | 1.59 Pounds |
| Dimensions | 9.00 x 6.00 x 1.11 In |
| List Price | $30.71 |
| Format | Paperback |
|---|---|
| Pages | 496 pages |
| Publisher | |
| Published On | 2009-08-01 |
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