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Pasture research has had a phenomenal growth in America during the past 30 years. With this development a variety of methods and ways of expressing yields of pastures have been employed. Recognizing this fact as an obstacle in the way of maximum progress, committees of the American Society of Agronomy, the American Dairy Science Association, and the American Society of Animal Production have studied the problem and as a result, have proposed tentative procedures and methods of expressing yields as a guide for research workers. In formulating this report to supersede earlier ones (11) the committees recognize that the procedure employed may vary with the type of experiment conducted, whether it be a measure of growth response to particular fertilizer treatments, a comparison of different systems of grazing management, or some other important pasture problem. The committees also realize that not all investigators will be able to carry out each of the suggestions in full, and in some cases certain adaptations will be necessary.
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