منابع مشابه
Swine Manure Management
Production of pork is a major agricultural enterprise in the United States, and a majority of the production occurs in the Midwest (Ohio to Nebraska and Minnesota to Missouri) and North Carolina. Seventy-nine percent of the hogs and pigs marketed in 1987 (96.6 million head) were produced in the north-central region of the United States (Bureau of the Census 1989). Iowa has ranked first in hog i...
متن کاملSwine Manure Management (II)
There is a national trend for swine enterprises to increase in size due to cost efficiencies associated with economies of scale. This study was performed to evaluate the effect of farm size on manure application management for a survey o f 391 swine producers in Minnesota. There was a statistically significant effect of farm size on almost all of the variables evaluated. As farm size increased:...
متن کاملEnzymatic hydrolysis of organic phosphorus in swine manure and soil.
Organic phosphorus (Po) exists in many chemical forms that differ in their susceptibility to hydrolysis and, therefore, bioavailability to plants and microorganisms. Identification and quantification of these forms may significantly contribute to effective agricultural P management. Phosphatases catalyze reactions that release orthophosphate (Pi) from Po compounds. Alkaline phosphatase in tris-...
متن کاملOdor Control in Liquid Swine and Dairy Manure
In a series of five tests, liquid polyphosphate fertilizer solution was used to treat liquid dairy and swine manure to control odors. Potassium permanganate, a pesticide-wetting agent, nitrogen-zinc liquid fertilizer solution and a digestive deodorant were also used in several of the tests. All tests were evaluated by an odor panel for odor strength and odor quality. The polyphosphates did not ...
متن کاملAdvanced swine manure treatment and utilization in Brazil.
Animal production has changed from subsistence to an industrial model, lowering production costs but giving rise to higher potential environmental impact. When the effluents are not correctly managed, serious pollution events can occur. In Brazil liquid manure is commonly stored in reception pits or covered lagoons (biodigestors), followed by land application as a biofertilizer. In some regions...
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1983
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.56.3175