1 Agriculture Victoria, Department of Jobs, Precincts and Regions (DJPR), 1301 Hazeldean Road, Ellinbank, Victoria, 3821, https://intranet.djpr.vic.gov.au/, Michael.email@example.com,
2 Agriculture Victoria, DJPR, 124 Chiltern Valley Rd, Rutherglen, Victoria, 3685,
3 Agriculture Victoria, DJPR, 5 Ring Rd, Bundoora, Victoria, 3086,
4 Agriculture Victoria, DJPR, Midland Hwy, Epsom Victoria 3551 Epsom, 3685
Eutrophication in the Victorian Gippsland Lakes has been linked to agricultural nitrogen (N) inputs and their potential contribution to leaching losses. Quantifying N fluxes through dairy soils will indicate the importance of leaching to N losses in these systems. Movement of N through the soil profile of a dairy farm in the Gippsland, Victoria, was investigated over a 24-month period. Urine treatments resulted in sizeable yield responses with ~100% increase in pasture dry matter yields above control treatments at first harvest after urine application. Pasture response continued up to four more harvests with N uptake from 19-47%. Fertiliser resulted in almost negligible N leached. The implication of this research is that cow urine is a larger determinant than fertiliser use of N lost from farms.