The Economic Value of Manure From Confinement Finishing of Hogs
The Economic Value of Manure From Confinement Finishing of Hogs
Roy Neuman Van Arsdall
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Seventy-two to 90 percent of each of these elements passes through hogs into the excreta (Table 9). At this rate, the value of the soil fertility elements excreted by one hog while growing from 50 to 220 pounds averages $1. 62 based on 1960 prices for the same elements in straight commercial fertilizer materials. Total value could run as Table 8. Percentage of Specified Soil Fertility Elements in Selected Feedstuffs* Content of fertility elements Feedstuff Nitrogen Phosphorus PaOs Potassium K 2... O Corn, dent No 2 1 39 27 percent 62 29 35 Soybean meal, solvent, 44-percent- protein guarantee 7. 31 0. 63 1. 44 1. 92 2. 31 Morrison, F. B. , Feeds and Feeding, 22nd ed. , 1956. Table 9. Amount and Value of the Chief Soil Fertility Elements Present In and Excreted From a Swine Growing Ration' Feed Fertility elements N P 2 5 K 2 O Corn, Ib 512 7. 12 6. 07 13. 19 72 9. 50 0. 12 31. 14 3. 17 1. 20 4. 37 83 3. 63 #0. 09 0. 33 1. 79 1. 92 3. 71 90 3. 34 0. 044 0. 15 Soybean meal, Ib. 83 Total 595 Percent excreted* 5 Pounds excreted Value per pound Total value of fertility elements excreted The rate of feed conversion is assumed to be 3.
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