Climate change, winter wheat yield and soil erosion on the English south downs

Abstract The EPIC (Erosion-Productivity Impact Calculator) model is used to assess the impact of increased atmospheric CO2 levels upon winter wheat yield and soil erosion on the UK South Downs. This impact includes both the direct effects of increased CO2 concentration upon the crop's metabolic processes, and the indirect effects of CO2-induced climate change upon crop growth. Yield increases are predicted under the majority of climatic scenarios used in the simulations; these increases are considerable when the direct effects of increased CO2 levels are considered. However, they are unlikely to be realised in practice due to increased pest competition. An increase in erosion is predicted for the wetter scenarios. The EPIC model appears generally suited to this kind of impact analysis, although changes are required in some areas.

[1]  C. Jones,et al.  Conservation impacts on crop productivity for the life of a soil , 1989 .

[2]  Ian R. Bowler,et al.  Climate Change and World Agriculture , 1990 .

[3]  A. Bouwman.  Land use related sources of greenhouse gases. Present emissions and possible future trends , 1990 .

[4]  J. Boardman,et al.  Cultivatino practice, sowing season and soil erosion on the South Downs, England: a preliminary study , 1988, The Journal of Agricultural Science.

[5]  M. Parry,et al.  The potential effects of climate change in the United Kingdom. , 1992 .

[6]  John R. Williams,et al.  EPIC-erosion/productivity impact calculator: 2. User manual. , 1990 .

[7]  James H. Williams,et al.  Using the erosion-productivity impact calculator (EPIC) model to estimate the impact of soil erosion for the 1985 RCA appraisal , 1988 .

[8]  M. Parry.  The potential impact on agriculture of the greenhouse effect. , 1990 .

[9]  J. Boardman,et al.  Climate change and soil erosion on agricultural land in england and wales , 1990 .

[10]  R. Evens.  Crop patterns recorded on aerial photographs of England and Wales: their type, extent and agricultural implications , 1990, The Journal of Agricultural Science.

[11]  John A. Dearing,et al.  Soil erosion on the South Downs: a review. , 1990 .

[12]  T. Carter,et al.  The choice of first-order impact models , 1988 .

[13]  W. Bach.  Development of Climatic Scenarios: A. From General Circulation Models , 1988 .

[14]  Timothy R. Carter,et al.  The Impact of climatic variations on agriculture , 1988 .

[15]  Paul T. Dyke,et al.  EPIC: An operational model for evaluation of agricultural sustainability , 1991 .

[16]  T. Carter,et al.  The greenhouse effect and the future of UK agriculture , 1989 .

[17]  Andrew N. Sharpley,et al.  EPIC, Erosion/Productivity Impact Calculator , 1990 .

[18]  John R. Williams,et al.  A modeling approach to determining the relationship between erosion and soil productivity [EPIC, Erosion-Productivity Impact Calculator, mathematical models] , 1984 .

[19]  T. Carter,et al.  The assessment of effects of climatic variations on agriculture: aims, methods and summary of results , 1988 .

[20]  B. Hopkins.  The effects of the 1976 drought on chalk grassland in Sussex, England. , 1978 .

[21]  J. Boardman.  Severe erosion on agricultural land in East Sussex , 1988 .