The Land We Love Volume 2

The Land We Love Volume 2

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1866 edition. Excerpt: could be made to " laugh at the abundance in conse uenoe thereof." l.'he benefidal effects of irrigation was known and largely practised by the aborigines in the days of Montezuma; by the Aztecs in South America; by the Egyptians, the Greeks, the Romans, and from time immemorial by the Chinese, and largely practised by the Italians, the Germans, the English, &c. The only examples of systematic irrigation in the Southern States is that applied to the culture of rice., Rain water comes to the earth charged with the fertilizing properties of the atmosphere. As we might conclude the first rain that falls is richer than that which comes down later; and as a consequence the air after a rain is much purer than it was previously.--Among the substances thus brought down by rain, dews and snow, the following stand prominent; dissolved oxygen (not to be confounded with that combined with hydrogen) held in feeble combination. producing chemical changes, when free oxygen would not, ammonia, nitric, hosphoric, and carbonic aci s, salt, wafted from the ocean, together with organic, and mineral substances more or loss minutely divided, and held in suspension. Ammonia and nitric acid are considered the main purveyors of nitrogen to plants. Their existence in the atmosphere is a. natural mnsequenoe 'of the decomposition of animal organisms in the air and u n the surface of the carth.--. P osphoric acid has a similar origin. The sewerage water from cities. rich in fertilizing material, with but a limited number of excep tions, finds its way, (first polluting ure streams) to the ocean.--he two instances alluded to are the irrigation of meadows in the environs of Edinburg, in Scotland, from the sewerage waters of that city: more

Product details

  • Paperback | 238 pages
  • 189 x 246 x 13mm | 431g
  • United States
  • English
  • black & white illustrations
  • 1236764005
  • 9781236764003