Agronomic and environmental soil phosphorus testing in soils receiving liquid swine manure
January 1, 1996
There is uncertainty concerning evaluation of bioavailable P in manured soils. This study assessed P availability in manured Iowa soils by measuring soil P with agronomic and environmental P tests...
Characteristics of phototrophic and non-phototrophic lagoons for swine manure
January 1, 1996
Odors are a major result of inadequately sized and mismanaged anaerobic lagoons. However, purple or pink colored lagoons, indicating the presence of phototrophic purple bacteria, are less likely to...
Manure-Phosphorus in Soil: Detection and Mobility of Phytate
January 1, 1996
Annual swine effluent application in western Oklahoma for 11 consecutive years did not lead to significant accumulation of soil phosphorus. Similar trend was shown in a century-old field experiment...
Reduction of odor and volatile substances in pig slurries by using pit additives
January 1, 1996
The effects of five commercial pit additive products on the release of odour nuisance and volatile compounds from swine manure were examined. The changes of pH, volatile fatty acids, total solids,...
An Integrated Index of Electrical Energy Use in Canadian Agriculture with Implications for Greenhouse Gas Emissions
January 1, 1996By J.A. Dyer
Electricity is fundamental to many farm chores. In this paper quantitative indices of electrical energy use were developed which reflect direct on-farm decisions for measures that farmers can adopt...
Evaluating the use of straw and other floating materials to control odor and gases from pig manure storage units
January 1, 1996
The use of various floating covers on commercial manure storage units to control odour and H2S emissions was evaluated and the management requirements to maintain the covers were identified. When...
Anaerobic decomposition of swine manure and ammonia generation in a deep pit
January 1, 1996
This article reports a laboratory study of swine manure decomposition in a deep pit. Distributions of solids, organic matter, pH, and ammonia in fresh swine manure after 12 h settling in a 1.2 m...
Effects of frequency and quantity of sprinkling canola oil on dust reduction in swine buildings
January 1, 1996
Dust concentrations in animal buildings can be reduced by sprinkling a small quantity of canola (rapeseed) oil on the floor. The efficiency of dust reduction was expected to be dependent on the...
Methane emissions from an anaerobic swine lagoon
January 1, 1996By R. R. Sharpe
Gaseous methane (CH4) emissions from a swine waste holding lagoon were determined periodically during the year. Micrometeorological techniques were used in order that emission rates from the lagoon...
Forage characteristics, steer performance, and water quality from bermudagrass pastures fertilized with two levels of nitrogen from swine lagoon effluent
January 1, 1996
Four 0.8-ha pastures of bermudagrass (Cynodon dactylon [L.] Pers.) were fertilized with either 456 or 873 kg/ha of nitrogen (N) from swine lagoon effluent (two replicates per treatment) and grazed by...
