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Andy Macdonald
Researcher at Rothamsted Research
Publications - 84
Citations - 3148
Andy Macdonald is an academic researcher from Rothamsted Research. The author has contributed to research in topics: Soil carbon & Soil organic matter. The author has an hindex of 23, co-authored 81 publications receiving 2470 citations. Previous affiliations of Andy Macdonald include The Hertz Corporation & University of Hertfordshire.
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Journal ArticleDOI
Soluble organic nitrogen in agricultural soils
Daniel Murphy,Andy Macdonald,E. A. Stockdale,Keith Goulding,S. Fortune,John L. Gaunt,Paul R. Poulton,J. A. Wakefield,Colin P. Webster,W. S. Wilmer +9 more
TL;DR: In this paper, the size and function of both soluble organic N extracted from soils (SON) and dissolved organic N present in soil solution and drainage waters (DON) in arable agricultural soils are reviewed.
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The potential to increase soil carbon stocks through reduced tillage or organic material additions in England and Wales: a case study
David S. Powlson,A. Bhogal,B.J. Chambers,Kevin Coleman,Andy Macdonald,Keith Goulding,Andrew P. Whitmore +6 more
TL;DR: In this paper, the authors quantify the impact on climate change mitigation of soil organic carbon (SOC) stocks as a result of a change from conventional to less intensive tillage and the addition of organic materials including farm manures, digested biosolids, cereal straw, green manure and paper crumble.
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Major limitations to achieving “4 per 1000” increases in soil organic carbon stock in temperate regions: Evidence from long‐term experiments at Rothamsted Research, United Kingdom
TL;DR: It is suggested it is more realistic to promote practices for increasing SOC based on improving soil quality and functioning as small increases can have disproportionately large beneficial impacts, though not necessarily translating into increased crop yield.
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Unused fertiliser nitrogen in arable soils: its contribution to nitrate leaching
TL;DR: This article showed that almost all of the nitrate at risk to leaching over the winter period comes from mineralisation of organic N, not from unused fertiliser applied in spring, and that even a drastic reduction in N fertiliser use would have little effect on nitrate leaching.
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Grassland biodiversity bounces back from long-term nitrogen addition
Jonathan Storkey,Andy Macdonald,Paul R. Poulton,Tony Scott,Iris H. Köhler,Hans Schnyder,Keith Goulding,Michael J. Crawley +7 more
TL;DR: Evidence is presented from the 160-year-old Park Grass Experiment that shows a positive response of biodiversity to reducing N addition from either atmospheric pollution or fertilizers, and a comparable response of plant communities to reduced N inputs has yet to be observed in the wider landscape.