Bulletin - California Agricultural Experiment Station Volume 127-150

Bulletin - California Agricultural Experiment Station Volume 127-150

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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. 1900 edition. Excerpt: ...this method carefully and intelligently, most of the lands of the silty character can probably be successfully cultivated to crops not too sensitive to alkali, provided they are not underlaid at too shallow a depth by the impervious clay; as is frequently the case between the two rivers. The clay will of course arrest the alkali-laden irrigation water in its downward course, and thus from a depth of a few feet it will be constantly reascending toward the surface. Such land will be hard to cultivate successfully without actual underdrainage, except to the hardiest crops, such as sorghum, barley, and shallow-rooted plants generally. Alfalfa can hardly be a success on land having the clay within less than five feet; for fifteen or twenty feet are ordinary depths of penetration for its roots. When the clay layer is not of great thickness and is underlaid by silty materials, success in tree-planting may be attained by blasting with giant powder; as is commonly done with hardpan of other kinds, when a good soil material is known to lie beneath. In the case of alfalfa, viodiola, and other plants which eventually cover and shad'e the ground very fully, the evaporation through the roots and leaves will largely prevent the rise of the alkali, even when flooding is practiced. It is clear that, in this region at least, no farmer can afford to be ignorant of the undersoil conditions upon his land; and if heavy irrigation is practiced, he should make absolutely sure by personal observation that the soil is actually being wetted to the depth of five or six feet, and note how long it takes to bring about this wetting. Such examination can be made either by means of a long-shafted posthole auger or twoinch carpenter's auger; or more quickly, after some...
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Product details

  • Paperback | 278 pages
  • 189 x 246 x 15mm | 499g
  • United States
  • English
  • black & white illustrations
  • 1236980158
  • 9781236980151