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1. Four species of Medicago, six species of Trifolium and fourteen grass species, all frequently found in British dairy pastures, have been tested for oestrogenic activity by the mouse uterine weight method. Activity was detected in four, four and six species respectively.2. It is probable that the quantity of oestrogen present in British pasture plants is insufficient to affect milk composition in cows at pasture. Some further experiments with cows are, however, suggested which might elucidate this.

Mixed dairy pasture harvested at three stages of growth from the same area was ensiled using three degrees of consolidation in small experimental silos. Better fermentation characteristics, lower dry matter losses, and higher digestibilities were associated with heavier consolidations and with less mature pasture.