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Nitrogen fixation and soil nitrogen in organic ley arable rotations

Sanders, Ian; Watson, Christine; Rees, Robert and Atkinson, David (2002) Nitrogen fixation and soil nitrogen in organic ley arable rotations. In: Powell, Jane and et al., (Eds.) Proceedings of the UK Organic Research 2002 Conference, Organic Centre Wales, Institute of Rural Studies, University of Wales Aberystwyth, pp. 85-88.

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Summary

This report was presented at the UK Organic Research 2002 Conference. Nitrogen (N) fixation in a white clover/ryegrass mixture was measured in 1,2,3 and 4-year-old organically managed leys during 2000. N fixation varied between 73.7 in 1-year-old leys and 33.5 kg ha-1 in 4-year-old leys. Soil nitrate-N, grass N yield and N content of grass and clover were all lowest in 2-year-old leys and highest in 3-year-old leys. The proportion of clover nitrogen derived from the atmosphere (pNdfa) was significantly lower in 3-year-old leys.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:Colloquium of Organic Researchers; COR; white clover; ley-arable rotation, soil nitrogen,nitrogen fixation; rotation
Subjects: Crop husbandry > Crop combinations and interactions
Farming Systems > Farm nutrient management
Research affiliation: UK
UK > Colloquium of Organic Researchers (COR) > COR 2002
UK > Scottish Agricultural College (SAC)
Deposited By: Powell, Ms Jane
ID Code:8366
Deposited On:11 Oct 2006
Last Modified:12 Apr 2010 07:33
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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