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Published online by Cambridge University Press: 10 May 2017
Until recently, nutrient losses from livestock manure have been of little concern. Manure, a valuable by-product in the past, is now regarded as a waste product to be disposed of in the cheapest manner possible. The cost of manure handling frequently exceeds the value of the nutrients in it. This is still true in 1974 even though the price of fertilizer has increased substantially.