The Intradermal Test for Tuberculosis in Cattle and Hogs
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. 1914 edition. Excerpt: ...not the case, for the alluvial soils are richer, and even the gray loams have nearly as much as the black adobe in the first foot and are a little richer in the rest of the column. The color of a soil, then, is no certain guide as to the relative amount of humus it contains. Among the individual columns the richest of the alluvial group are those from Glenn and Chico, the former in the upper three feet and the latter in the entire column; there is.52 per cent in the twelfth foot of the Chico column. The richest of the clay loam group is that from Davis, the average in the upper three feet being 1.16 per cent and an average of.755 for the entire column; the twelfth foot contains.69 per cent. The columns from Tehama, Waltons, and Willows are next in their respective percentages, Waltons being the richest in the upper three feet. The black adobe east of Willows is the richest of the four that form the composite column, and contains an average of 1.27 per cent in the upper three feet. Soil Columns of the San Joaquin Valley. San Joaquin Valley, with an area of one thousand square miles, possesses many large and distinct soil types or regions, each of which is represented in our soil collection in columns of ten or twelve feet each. Twenty-four localities in eight counties were selected from which to obtain columns of soil as nearly typical as possible of each region, and fifteen of the columns were taken to depths of ten or twelve feet, the others being limited in depth either by hardpan, coarse gravel or other obstruction which prevented the penetration of the soil auger; sometimes the water table at depths of less than ten feet produced such mushy conditions in the soil as to prevent its being removed by the auger. Rich Alluvial Lands and...
- Paperback | 218 pages
- 189 x 246 x 12mm | 399g
- 13 Sep 2013
- Illustrations, black and white