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...
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...
Groundwater nitrate depletion in a swine lagoon effluent-irrigated pasture and adjacent riparian zone
January 1, 1996By A. J. Sloan
Irrigation of anaerobic swine lagoon effluent onto cattle-grazed grass pastures represents a common waste treatment method in the Coastal Plain of North Carolina. However, such treatment strategies...
Soil chemical changes following manure application on irrigated alfalfa and rainfed timothy in southern Alberta
January 1, 1996
In areas within Alberta where suitable cultivated land is not available, or for convenience, the use of forage land is an alternative for manure application. However, there is limited research on the...
Effect of rate, frequency and method of liquid swine manure application on soil nitrogen availability, crop performance and N use efficiency in east-central Saskatchewan
January 1, 1996By J. J. Schoenau
A study was initiated in the fall of 1996 in the Black soil zone in east-central Saskatchewan (parkland region) to examine the soil and crop response to application of liquid swine manure at...
Environment - Manure Storage / Application
Manure incorporation equipment effects on odor, residue cover, and crop yield
January 1, 1996By H. M. Hanna
Field experiments in undisturbed (no-till) soyabean and maize residue were conducted to evaluate six liquid swine manure application/incorporation methods. The methods were injection with a...
Nitrification options for pig wastewater treatment
January 1, 1996By A. A. Szogi
Nitrification is a necessary and often limiting process in animal waste treatment for removal of nitrogen as N-2 through biological nitrification/denitrification systems. We evaluated three...
Environment - Air
Liquid balance model for swine waste management systems using single-stage anaerobic lagoons
January 1, 1996By Hector J. Cumba
The most important wastewater operation for farmers using lagoons to treat swine waste is maintaining the liquid level within the operational levels to avoid overflows and to satisfy the water demand...
N-management and crop rotation effects on yield and residual soil nitrate levels
January 1, 1996
Swine production facilities are becoming more concentrated in Iowa, and public is concerned about the impact of using swine manure for crop production on soil and water quality. This field study was...
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...
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...
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...
