Authors: Williams, JR Chambers, BJ Hartley, AR Ellis, S Guise, HJ

Citation: Jr. Williams et al., Nitrogen losses from outdoor pig farming systems, SOIL USE M, 16(4), 2000, pp. 237-243

Authors: Garwood, TWD Davies, DB Hartley, AR

Citation: Twd. Garwood et al., The effect of winter cover crops on yield of the following spring crops and nitrogen balance in a calcareous loam, J AGR SCI, 132, 1999, pp. 1-11