Abstract
ABSTRACT WATER quality was monitored for subsurface drainage from small plots receiving 325, 650 and 1300 kg N/ha/yr from sprinkler-irrigated swine-lagoon effluent. Subsurface flow volumes and nutrient concentrations are reported for 20 months at the end of a 6-yr treatment period. Nutrient mass balances for nitrogen and phosphorus which include uptake by Coastal bermudagrass, soil accumulation, surface runoff, subsurface drainage and an estimate of nutrients leaching below the root zone are reported.
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