Jones, J. R.; Maxwell, T. J.; Rees, M. Elaine; Munro, J. M. M.; Fothergill, Mick; Dalziel, A. J. L.; Sibbald, A. R.; Davies, D. Arthur
(2003-03)
The implications for the agricultural productivity of the UK upland sheep systems of reducing nitrogen fertilizer application and lowering stocking rates on perennial ryegrass/white clover swards were studied over 4 years ...