Lavas and Soils of the Hawaiian Islands

Lavas and Soils of the Hawaiian Islands

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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. 1898 edition. Excerpt: ...soils from some of these lands, and have obtained analyses made by other chemists, covering the coffee districts on Hawaii, and prospective coffee lands on Maui. The nitrogen in these thirteen coffee soils we compare with the nitrogen contents of the cane lands. We are indebted to the Government records for the "approximate mean rainfalls," and to our own observa tions in given districts. In one of the districts on Maui, a series of rain gauges placed at intervals up the moun tain side, from 200 feet to 3000 feet, gave an annual raim fall of 28 inches at 200 feet elevation; 60 inches at 900 feet; and 179 inches at 2800 feet In the Nuuanu valley, Oahu, the rainfall at sea level is near 30 inches, and at 900 feet it is 118 inches. On account of given questions and difficulties bearing upon the maintenance of fertility of the upland soils, as compared with the lowland soils, a very exhaustive series of experiments was undertaken in order to try to obtain precise data concerning the "availability of the elements; of plant food in the upland and lowland soils," the results of which will be set forth in the second part of this publication. The soils used in these experiments were, in the first place, subjected to exhaustive analysis in order to be able to note to what extent any differences in behaviour of the upland and lowland soils, under the action of solvents used, would appear to be due to fundamental or structural differences in their composition. These analyses we introduce at this place on account of their special bearing also upon the question of the relation of rainfall to the organic matter and nitrogen content of soils. The analyses include and represent the average of nine type samples and 108 sub-samples of...
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Product details

  • Paperback | 46 pages
  • 189 x 246 x 3mm | 100g
  • United States
  • English
  • black & white illustrations
  • 1236906942
  • 9781236906946