Phosphorus between soil, soil water and overland flow for established and laser graded, border-check irrigation systems

Webb, B, Nash, D, Hannah, M, Adeloju, S, Toifl, M, Roddick, F and Porter, N 2004, 'Phosphorus between soil, soil water and overland flow for established and laser graded, border-check irrigation systems', in Supersoil 2004: Proceedings of the Third Australian New Zealand Soils Conference, Sydney, Australia, 5-9 December 2004.


Document type: Conference Paper
Collection: Conference Papers

Title Phosphorus between soil, soil water and overland flow for established and laser graded, border-check irrigation systems
Author(s) Webb, B
Nash, D
Hannah, M
Adeloju, S
Toifl, M
Roddick, F
Porter, N
Year 2004
Conference name Australian New Zealand Soils Conference
Conference location Sydney, Australia
Conference dates 5-9 December 2004
Proceedings title Supersoil 2004: Proceedings of the Third Australian New Zealand Soils Conference
Publisher Regional Institute
Place of publication Sydney, Australia
Abstract Agricultural systems contribute to excessive phosphorus (P) additions that are adversely affecting water resources worldwide. The effects of soil disturbance on P exports have not been widely reviewed. In February 2004, four established and four recently laser graded (<4 yrs) border-check irrigation bays on the Macalister Research Farm (38°00'S 146°54'E) were sampled during and after irrigation. Samples were taken at the channel inlet and every 60 m thereafter. Overland flow was sampled at the wetting front and back up the bays, and soil samples were recovered from the sampling locations two days after irrigation. Overland flow was analysed for total P (TP), the soil samples were analysed for soil Olsen P (0-20 and 0-100 mm depths) and soil water, dissolved reactive P (SWDRP) and total P (SWTP) (0-20 mm depth).
Subjects Environmental Technologies
Keyword(s) phosphorus
overland flow
irrigation
laser graded
soil water
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