Organic Milk

The researchers collected 109 milk samples from 25 UK farms of three production types: low-input organic, low-input non-organic and high-input non-organic. A standard questionnaire was used to collect management and production information from the farms. The questionnaire covered dairy herd size, average cow weight and breeding details, total dry food intake per day and composition of diet during the outdoor period and indoor periods, i.e. the proportion of fresh grass or conserved forage such as grass silage or hay, cereals, by-products and vitamin and mineral supplements.