. Bacteria in relation to soil fertility. Soil microbiology; Bacteriology, Agricultural. 214 BACTERIA AND SOIL FERTILITY the soil better than will equivalent quantities of commercial fer- tilizers. This is true in the case of continuous wheat, barley, potatoes, mangels, and sugar-beets. The value of the manure produced in the United States can be seen from the following: "According to recent statistics there are in the United States in round numbers 19,500,000 horses, mules, etc., 61,000,000 cat-. Pic^ 43.—Beets grown on manured and unmanured soil. (Photo by Pittman.) tie, 47,000,000 hogs
. Bacteria in relation to soil fertility. Soil microbiology; Bacteriology, Agricultural. 214 BACTERIA AND SOIL FERTILITY the soil better than will equivalent quantities of commercial fer- tilizers. This is true in the case of continuous wheat, barley, potatoes, mangels, and sugar-beets. The value of the manure produced in the United States can be seen from the following: "According to recent statistics there are in the United States in round numbers 19,500,000 horses, mules, etc., 61,000,000 cat-. Pic^ 43.—Beets grown on manured and unmanured soil. (Photo by Pittman.) tie, 47,000,000 hogs and 51,600,000 sheep. Experiments indi- cate that if these animals were kept in stalls or pens throughout the year and the manure carefully saved, the approximate value of the fertilizing constituents of the manure produced by each horse or mule annually would be $27, by each head of cattle $20, by each hog $8, and by each sheep $2. The fertilizing value of manure produced by the different classes of farm animals of the United States would, therefore, be for horses, mules, etc., $526,500,000; cattle, $1,220,000,000; hogs, $376,000,000; and sheep, $103,200,000—or a total of $2,225,700,000. ''It is conservative to state that fully one-third of the manure. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Greaves, Joseph Eames, 1880-; Greaves, Ethelyn O. , joint author. New York, D. Van Nostrand Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbacteriologyagricult
