Results 231 to 240 of about 18,346 (270)

Animal manures as feedstuffs: Cattle manure feeding trials

Agricultural Wastes, 1983
Abstract The utilisation of ‘as-collected’ and processed beef cattle and dairy cow manure, manure screenings and anaerobically digested cattle manures was evaluated on the basis of the results of feeding trials reported in the literature. The maximum level of incorporating these manures into animal feed rations, i.e.
John H. Martin, Raymond C. Loehr, Thomas E. Pilbeam   +2 more
openaire   +1 more source

Effect of Mixing on Biomethanation of Cattle-Manure Slurry

Environmental Technology, 2002
The benefits and extent of mixing required during biomethanation of cattle-manure slurry was studied by investigating the effect of: 1) continuous and intermittent mixing, 2) agitator impeller speed and position; 3) not providing assisted mixing; 4) mixing on production of extracellular polymeric substances; and 5) mixing on the ultimate anaerobic ...
Ong, H.K., Greenfield, P.F., Pullammanappallil, P.   +2 more
openaire   +5 more sources

Composting of Cattle and Pig Manure

Journal of Veterinary Medicine, Series B, 1993
SummaryStudies of solid manure treatment on 83 Swedish dairy farms showed that no composting process occurred in the majority of cases while high temperatures could be found in the manure in 27 of 34 piglet producing farms. It was found that at least 2.5 kg of straw per cow and day must be used to get a manure that can be composted without forced ...
openaire   +2 more sources

Survival of Leptospires in Cattle Manure

Journal of the American Veterinary Medical Association, 1971
SUMMARY Leptospires were selected as the study model for measurement of survival of pathogens in cattle manure. A laboratory model of a field oxidation ditch was developed and utilized. The studies were conducted under simulated field summer conditions. Leptospires survived in manure in Selas candles for 6 days, in the manure of the oxidation ditch for
openaire   +2 more sources

Problems of Recycling Manure for Feed Cattle Manure

American Association of Bovine Practitioners Conference Proceedings, 1975
Animal waste, what is it? I think today we must pretty well accept, based on the data, that it is are source out of place. It is out of place and many times we don't like to fool with it because it is so out of place. Manure to improve feed efficiency of cattle.
openaire   +1 more source

Physical and Thermal Characteristics of Dairy Cattle Manure

Journal of Environmental Quality, 2014
Greenhouse and regulated gas emissions from animal waste are naturally mediated by moisture content and temperature. As with soils, emissions from manure could be readily estimated given the physical, hydraulic, and thermal properties are described by models and microbes and nutrients are not limiting factors.
Pakorn, Sutitarnnontr, Enzhu, Hu, Markus, Tuller, Scott B, Jones   +3 more
openaire   +2 more sources

Synthesis and Stability of Dimethylnitrosamine in Cattle Manure

Journal of Environmental Quality, 1976
AbstractBeef cattle feedlots are a source of large quantities of organic and inorganic nitrogen compounds, among which are the precursors for the synthesis of N‐nitrosamines, compounds carcinogenic to laboratory test animals and, possibly, to man.Our objectives in this study were: (i) to determine if N‐dimethylnitrosamine (DMNA) and N ...
A. R. Mosier, S. Torbit
openaire   +1 more source

Utilization of Cattle Manure for Fertilizer

2019
Cattle manure is considered a good "shotgun" fertilizer. Liquid beef cattle manure is produced in beef cattle confinement buildings at the rate of.6 to 1.0 cu ft/hd/day depending upon ration and live weight. Crop yields resulting from application of liquid beef cattle manure have been studied by many researchers.
openaire   +1 more source

Environmental Impacts of Cattle Manure Composting

2002
Measurement of the losses of nutrients during composting is needed to understand the composting process, to implement methods of nutrient conservation and highlight potential environmental impacts. Cattle manure was aerobically composted under ambient conditions to evaluate composting as a method of manure handling.
P. A. Gibbs, R. J. Parkinson, T. H. Misselbrook, S. Burchett   +3 more
openaire   +1 more source

Anoxic–aerobic treatment of the liquid fraction of cattle manure

Waste Management, 2009
Cattle manure from a dairy farm was treated in order to reduce its pollution potential. The manure came from a farm with 120 cows kept in stables in a free stall barn. As pretreatment, the manure is usually filtered on the farm using a screw press separator with a 0.5 mm mesh.
L, Castrillón, Y, Fernández-Nava, E, Marañón, L, García, J, Berrueta   +4 more
openaire   +2 more sources