Understanding and managing uncertainties to improve biofuel GHG emissions calculations.

[1]  Sam W. Wood,et al.  A Review of Greenhouse Gas Emission Factors for Fertiliser Production. , 2004 .

[2]  S. Polasky,et al.  Land Clearing and the Biofuel Carbon Debt , 2008, Science.

[3]  D. Powlson,et al.  Influence of soil type, crop management and weather on the recovery of 15N-labelled fertilizer applied to winter wheat in spring , 1992, The Journal of Agricultural Science.

[4]  Vincent Mahieu,et al.  Well-to-wheels analysis of future automotive fuels and powertrains in the european context , 2004 .

[5]  V. R. Phillips,et al.  Development and application of a mechanistic model to estimate emission of nitrous oxide from UK agriculture , 2002 .

[6]  E. Pattey,et al.  Modeling the Effects of Fertilizer Application Rate on Nitrous Oxide Emissions , 2006 .

[7]  B. Ball,et al.  Soil and residue management effects on cropping conditions and nitrous oxide fluxes under controlled traffic in Scotland , 1999 .

[8]  J. Nix Farm management pocketbook , 1980 .

[9]  Roger Sylvester-Bradley,et al.  Facilitating carbon (GHG) accreditation schemes for biofuels: feedstock production. , 2008 .

[10]  Sylvia Charp,et al.  Model applications , 1991 .

[11]  R. Lal,et al.  Carbon emission from farm operations. , 2004, Environment international.

[12]  Roger Sylvester-Bradley,et al.  Effects of variety and fertiliser nitrogen on alcohol yield, grain yield, starch and protein content, and protein composition of winter wheat , 2008 .

[13]  N. Wrage,et al.  Role of nitrifier denitrification in the production of nitrous oxide , 2001 .

[14]  William F. Cormack,et al.  Energy use in organic farming systems (OF0182) , 2000 .

[15]  D. Kindred,et al.  Optimising nitrogen applications for wheat grown for the biofuels market. , 2007 .

[16]  Tom Addiscott,et al.  Partitioning losses of nitrogen fertilizer between leaching and denitrification , 1992, The Journal of Agricultural Science.

[17]  Barbara Amon,et al.  Greenhouse gas and ammonia emission abatement by slurry treatment , 2006 .

[18]  Keith A. Smith,et al.  Nitrous oxide emissions from intensive agricultural systems: Variations between crops and seasons, key driving variables, and mean emission factors , 1999 .

[19]  S. Singh,et al.  Temporal changes in N2O efflux from cropped and fallow agricultural fields , 2006 .

[20]  J. Williams,et al.  A review of research to identify best practice for reducing greenhouse gases from agriculture and land management , 2007 .

[21]  E. Stehfest,et al.  N2O and NO emission from agricultural fields and soils under natural vegetation: summarizing available measurement data and modeling of global annual emissions , 2006, Nutrient Cycling in Agroecosystems.

[22]  David S. Powlson,et al.  Enhancing the carbon sink in European agricultural soils: including trace gas fluxes in estimates of carbon mitigation potential , 2001, Nutrient Cycling in Agroecosystems.

[23]  J. Hatfield,et al.  Encyclopedia of Soils in The Environment , 2004 .

[24]  V. Jain,et al.  Biological nitrogen fixation with non-legumes : An achievable target or a dogma? , 2007 .

[25]  E. Paul,et al.  Gaseous nitrogen losses from soils under zero-till as compared with conventional-till management systems , 1984 .

[26]  J. Archer Crop nutrition and fertiliser use. , 1985 .

[27]  D. Powlson,et al.  Effects of season, soil type and cropping on recoveries, residues and losses of 15N-labelled fertilizer applied to arable crops in spring , 1997, The Journal of Agricultural Science.

[28]  Keith A. Smith,et al.  N 2 O release from agro-biofuel production negates global warming reduction by replacing fossil fuels , 2007 .

[29]  Allen C. McBride,et al.  The contribution of agricultural lime to carbon dioxide emissions in the United States: dissolution, transport, and net emissions , 2005 .

[30]  J. Davis,et al.  Life cycle inventory (LCI) of fertiliser production. Fertiliser products used in Sweden and Western Europe , 1999 .

[31]  B. J. Chambers,et al.  Predicting nitrogen availability and losses following application of organic manures to arable land: MANNER , 1999 .

[32]  A. Riche,et al.  Carbon sequestration in European soils through straw incorporation: limitations and alternatives. , 2008, Waste management.

[33]  R. Thorman Nitric oxide emissions from agricultural soils , 2003 .

[34]  Keith A. Smith,et al.  Climate‐ and crop‐responsive emission factors significantly alter estimates of current and future nitrous oxide emissions from fertilizer use , 2005 .

[35]  David S. Powlson,et al.  Preliminary estimates of the potential for carbon mitigation in European soils through no‐till farming , 1998 .

[36]  P. Loveland,et al.  Crop residue returns and equilibrium soil organic carbon in England and Wales , 2003 .

[37]  Keith A. Smith,et al.  Nitrous oxide emission factors for agricultural soils in Great Britain: the impact of soil water‐filled pore space and other controlling variables , 2003 .

[38]  Barbara Amon,et al.  Methane, nitrous oxide and ammonia emissions during storage and after application of dairy cattle slurry and influence of slurry treatment , 2006 .

[39]  M. A. Elsayed,et al.  CARBON AND ENERGY BALANCES FOR A RANGE OF BIOFUELS OPTIONS , 2003 .

[40]  Jo Smith,et al.  Greenhouse gas mitigation in agriculture , 2008, Philosophical Transactions of the Royal Society B: Biological Sciences.

[41]  Roger Sylvester-Bradley,et al.  Wheat as a feedstock for alcohol production , 2006 .

[42]  B. McConkey,et al.  Nitrous Oxide Emissions from Agricultural Toposequences in Alberta and Saskatchewan , 2004 .

[43]  Changsheng Li,et al.  A model of nitrous oxide evolution from soil driven by rainfall events: 1. Model structure and sensitivity , 1992 .

[44]  R. Bradley,et al.  Current trends of soil organic carbon in English arable soils , 2005 .

[45]  David S. Powlson,et al.  Revised estimates of the carbon mitigation potential of UK agricultural land , 2000 .

[46]  David S. Powlson,et al.  Biofuels and other approaches for decreasing fossil fuel emissions from agriculture , 2005 .

[47]  G. Robertson,et al.  Nonlinear response of N2O flux to incremental fertilizer addition in a continuous maize (Zea mays L.) cropping system , 2005 .

[48]  Steve Frolking,et al.  A model of nitrous oxide evolution from soil driven by rainfall events: 2. Model applications , 1992 .

[49]  K. A. Smith,et al.  Nitrous oxide emissions from grassland and spring barley, following N fertiliser application with and without nitrification inhibitors , 1997, Biology and Fertility of Soils.

[50]  J. Wiseman,et al.  Opportunities and implications of using the co- products from biofuel production as feeds for livestock , 2007 .

[51]  Niels H. Batjes,et al.  Emissions of N2O and NO from fertilized fields: Summary of available measurement data , 2002 .

[52]  D. Powlson,et al.  Meeting the UK's climate change commitments: options for carbon mitigation on agricultural land , 2000 .

[53]  R. Bradley,et al.  Carbon sequestration and saving potential associated with changes to the management of agricultural soils in England , 2004 .

[54]  B. Hounsome,et al.  The British survey of fertiliser practice. Fertiliser use on farm crops for crop year 2000. , 1997 .

[55]  Keith A. Smith,et al.  Impact of different forms of N fertilizer on N2O emissions from intensive grassland , 2003, Nutrient Cycling in Agroecosystems.

[56]  R. Lal Global climate change and pedogenic carbonates , 2000 .

[57]  J. Elhai,et al.  Colonization of wheat para‐nodules by the N2‐fixing cyanobacterium Nostoc sp. strain 2S9B , 1999 .

[58]  A. F. Mackenzie,et al.  Nitrous oxide emission in three years as affected by tillage, corn-soybean-alfalfa rotations, and nitrogen fertilization , 1998 .

[59]  K. A. Smith,et al.  Nitrous oxide emissions from fertilised grassland: A 2-year study of the effects of N fertiliser form and environmental conditions , 1997, Biology and Fertility of Soils.

[60]  Roger Sylvester-Bradley,et al.  Future wheat yields: evidence, theory and conjecture. , 2005 .

[61]  Jacinto F. Fabiosa,et al.  Use of U.S. Croplands for Biofuels Increases Greenhouse Gases Through Emissions from Land-Use Change , 2008, Science.

[62]  P. Berry,et al.  A physiological analysis of oilseed rape yields: Past and future , 2006, The Journal of Agricultural Science.