Nitrous Oxide Emission from an Agricultural Soil Fertilized with Liquid Swine Waste or Constituents

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Sustainable pig production – evaluation of different scenarios

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The goal of pig production is to produce pig meat to as low cost as possible, as the industry in
large is based on short time profit. However, consumers and society show a growing interest
in production methods and quality of products (A

Sask Research Shows Forage Yields Boosted by Hog Manure

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Recent work at the the Prairie Agricultural Machinery Institute (PAMI) indicate that manure injection into standing grassland can produce significant results. Plots of crested wheatgrass, smooth brome grass, and Russian wild rye were injected with three different manure application rates: low (3,300 gal/acre), medium (6,600 gal/acre) and heavy (13,200 gal/acre). Yields in in treated plots were two to four times greater than the control plot, with crested wheat grass experiencing the greatest increase. Application rates in year one had enough carry-over to year two, to produce higher yields relative to the control plots. Manure seems to genrate significant increase in forage yield, however forage quality analysis should be taken prior to feeding manure-fertilzed feed to animals.

Sulfur and Nitrogen Balances in Biofilters for Odorous Gas Emission Control

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Biofiltration is a promising technology for reducing odor and gas emission from livestock operations. Tqo important operating parameters in biofiltration – media mixture content (MC) and gas retention time (RT) were studied to determine there effcets on sulfur and nitrogen balances. Laboratoru experiments were carried out to determine S and N accumulations in and emissions from biofilters with various media (MC 30%, 40%, 50%) and RT (5, 10, 20sec). The biofilter media was a mixture of compost and wood chips. The media bed was .20m deep and 0.30m in diameter. Two trials were run. Results showed that 47% to 94% of the hydrogen sulfide and 25 to 90% of ammonia were removed by the biofilters. Removal efficiency varied with treatment. Biofilters with 50% MC and 20 sec RT had the highest removal efficiency for H2S and ammonia, with the average H2S removal rates of 92.8% in trial 1 and 94.2% in Trial 2. Average ammonia removal efficiencies of these biofilters were 90.3% in trial one and 75.8% in trial 2. N and S accumulation in the biofilter media was also affected by MC and RT.

Comparative Effectiveness of 5 Manure Pit Additives-Poster

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The relative effectiveness of 5 manure pit additives was studied using experimental procedures. American BioCalaysts, Pit Boss, Westbridge, Biozest and Viclout/Xcite were tested in commercial scale manure channels and outdoor simulated storage for two experiments. Odour thresholf varied from being 49% higher to 16% lower compared to untreated manure in the indoor phase.

Anaerobic Digestion: Holistic Bioprocessing of Animal Manures

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Toxoplasma gondii: from animals to humans

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BURST RELEASES OF HYDROGEN SULFIDE IN MECHANICALLY VENTILATED SWINE BUILDINGS

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Diseases Caused by Dematiaceous Fungal Pathogens as Potential Limiting Factors for Production of Bermudagrass on Swine Effluent Application Sites

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Environmental Interactions with Agricultural Production

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Agricultural production uses land, fertilizers, pesticides, water, and other inputs that can have an impact on the environment and potentially harm human and ecosystem health. This Briefing Room describes agriculture’s interactions with environmental quality, and the policy responses for improving environmental performance.