Environmental pressures on the agricultural industry to reduce the use of nitrogenous fertilizer, coupled with the improvement and availability of varieties have led to renewed interest in white clover for dairy systems in the UK. In addition clover has nutritional merit as a supplement to grass which can lead to increased forage intakes and improved subsequent animal performance. In this experiment two silages of perennial ryegrass and white clover Here fed to autumn calving dairy cows in varying ratios to evaluate white clover as a forage supplement for cows fed low levels of compound.