Simulation dataset of annual yields, GHG emissions and SOC stocks under current and projected climate conditions for major crops with current and reduced fertiliser rates in Southwest, England

Using site specific spatial data and information, two agroecosystem models (SPACSYS and RothC) were integrated to quantify the effects of 3 fertiliser reductions (10%, 30% and 50%) under baseline and projected climate scenarios (RCP2.6, RCP4.5 and RCP8.5) in Southwest, England. 48 unique combinations of soil types, climate conditions and fertiliser inputs were evaluated for five major arable crops (winter wheat, maize, winter barley, spring barley, winter oilseed rape) plus ryegrass. Modelled annual estimates of crop yields, biomass, emissions of GHG gases (nitrous oxide, methane, carbon) and SOC stocks in the topsoil (0-30 cm) were tabulated with relevant metadata attached.