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Potential of Earthworm Burrows to Transmit Injected Animal Wastes to Tile Drains

^a USDA-ARS, North Appalachian Experimental Watershed, P.O. Box 488, Coshocton, OH 43812-0488 USA
^b Usda-Nrcs, Findlay, OH 45840 USA

View larger version (153K): [in a new window]   Fig. 1 Turbine blower used to force smoke into the tile line

View larger version (128K): [in a new window]   Fig. 2 Smoke emerging from middens in an 1 m wide band above the buried tile

View larger version (19K): [in a new window]   Fig. 3 Average infiltration rate in individual earthworm burrows as a function of distance from the buried tile

View larger version (130K): [in a new window]   Fig. 4 Earthworm burrow closely associated with the buried tile. This burrow approached within 3 cm of the tile and had an average infiltration rate of 236 mL min-1