Abstract
Soil nitrogen concentrations beneath the floors of 30 poultry houses were compared to evaluate factors whichwould correlate with the relative concentrations. Three soil borings, 1.5 m deep, inside of the houses were taken duringboth fall and spring conditions of soil moisture. Samples were analyzed for ammonia, nitrate, total Kjeldahl nitrogen, andmoisture content and results were reported as mg N per kg of dry soil. The overall mean values for each house werecalculated for each floor type: loose soil, compacted soil, and concrete with polyethylene. The average nitrateconcentrations were 245, 263, and 14 mg NO3-N/kg of dry soil, respectively. Other factors that related to a significantdifference in nitrogen concentrations were age of the house and topography of the site. Factors not related to nitrogenvariations in this study were drainage characteristics of the site, litter age, and depth to water table.
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