. Soils, their properties and management. Soils. 600 SOILS: PE0PEETIE8 AND MANAGEMENT Under conditions on the average farm such losses may easily rise to 50 per cent of all the constituents, and prob- ably very much higher as regards nitrogen and potash. From one-half to three-fourths of the important elements contained in the original food fails to again reach the land. Hall/ quoting from Woods' experiments at Cam- bridge, shows that about 10 per cent of the nitrogen in the food consumed is retained by the animal. He also shows that 15 per cent of nitrogen is lost during the making, and from
. Soils, their properties and management. Soils. 600 SOILS: PE0PEETIE8 AND MANAGEMENT Under conditions on the average farm such losses may easily rise to 50 per cent of all the constituents, and prob- ably very much higher as regards nitrogen and potash. From one-half to three-fourths of the important elements contained in the original food fails to again reach the land. Hall/ quoting from Woods' experiments at Cam- bridge, shows that about 10 per cent of the nitrogen in the food consumed is retained by the animal. He also shows that 15 per cent of nitrogen is lost during the making, and from 10 to 25 per cent during the storage, of the ma- nure, even under the best conditions. This gives a total loss of nitrogen amounting to from 35 to 50 per cent. If this is the loss under the best conditions, it can readily be seen that the loss on an average farm must approach 65 or 75 per cent. Some idea as to separate losses from fermentation and leaching may be gained from data drawn from Canada.^ In this experiment a mixture of horse dung and cow dung was divided. One-half was placed in a bin under a shed; the other half was exposed to the weather, outside in a similar bin. After a year the two portions were analyzed and the losses computed: — Losses from Manure after Twelve Months Loss of organic matter Loss of rdtrogen . Loss of phosphoric acid Loss of potash . .. XJnpbotectiid (Per cent) 69 40 16 36 1 Hall, A. D. Fertilizers and Manures, p. 198. New York. 1910. ^ Sehutt, M. A. Barnyard Manure. Canadian Dept. Agr., Centr. Exp. Farm, Bui. 31. 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 Lyon, T. L. (Thomas Lyttleton), 1869-1938; Fippin, Elmer O. (Elmer Otterbein), 1879-1949; Buckman, Harry Oliver, 1883-. New York, Macmillan
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