Abstract
The need for a dairying industry based on achieving adequate milk outputs per cow at relatively low costs of production is outlined. The effects of level concentrate input in such a system has been examined and it has been shown that the optimum economic level is considerably below that required to meet theoretical requirements. The benefits of improved silage quality are outlined. The effect of protein content of the concentrate on milk output is examined and the response to increasing protein content shown to greatly depend upon the overall level of energy feeding in the diet. The considerably increased response to high protein levels when high quality silage diets are used is also discussed with preliminary observations on a market response to increased protein when cows are at pasture.
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