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Phosphorus losses from arable land in England.

Catt, J. A. and Howse, K. R. and Farina, R. and Brockie, D. and Todd, A. and Chambers, B. J. and Hodgkinson, R. and Harris, G. L. and Quinton, John N. (1998) Phosphorus losses from arable land in England. Soil Use and Management, 14 (Supple). pp. 168-174. ISSN 0266-0032

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Abstract

Concentrations and annual loadings of molyhdate reactive P (MRP) and total (including particulate) P (TP) are reported from field drainage, catchment and erosion experiments in England. Annual losses through field drains and in catchment runoff were 0.037-0.74 kg MRP/ha and 0.37-2.64 kg TP/ha, but those in surface runoff from experimental plots measuring erosion were generally much greater (often > 3 kg MRP/ha and up to 32 kg TP/ha in a wet year). Amounts of TP in drainflow and catchment runoff depended upon factors influencing soil dispersibility, such as particle size distribution and calcium carbonate content. The results to date suggest that P losses in surface runoff and erosion from arable fields to water are best limited by: (a) maximizing crop cover, using minimal cultivation practices and where possible planting crop rows across rather than up and down the slope, (b) avoiding cultivation practices that result in dispersion of soil particles, and (c) avoiding application of P fertilizer to wet soils when rainfall is likely soon after application. Consideration should he given to maintaining field drains below peak efficiency to reduce subsurface P losses.

Item Type: Article
Journal or Publication Title: Soil Use and Management
Uncontrolled Keywords: Phosphorus • runoff • drainage water • losses from soil • minimum tillage • flow to drains • UK
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 13180
Deposited By: Dr John Quinton
Deposited On: 11 Feb 2009 13:45
Refereed?: Yes
Published?: Published
Last Modified: 10 Dec 2016 01:12
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/13180

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