Nutrient , Sediment , and Bacterial Losses in Overland Flow from Pasture and Cropping Soils Following Cattle Dung Deposition

  title={Nutrient , Sediment , and Bacterial Losses in Overland Flow from Pasture and Cropping Soils Following Cattle Dung Deposition},
  author={Richard W. McDowell and Richard William Muirhead and Ross Martin Monaghan},
The loss of phosphorus (P), suspended sediment (SS), ammonia (NH4 þ-N), nitrate (NO3 -N), and Escherichia coli in overland flow (OF) from dairy cattle dung can impair surface water quality. However, the risk of P and N loss from grazed pastures varies with time. Current practice in southern New Zealand is to select a field, cultivate, sow in Brassica spp., and graze in winter to save remaining pasture from damage. This deposits dung when soil is wet and OF likely. Hence, we determined P, NH4… CONTINUE READING
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