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Fig. 4. Relationship between measured and predicted field N mineralization at 0- to 5-cm depth for 2000 vegetative stage of the growing season by manure application, mineral fertilizer application, and an unfertilized control. (Residual1) represents 10 yr of N application and 1 yr of residual N; (Residual6) represents 5 yr of N application and 6 yr of residual N.
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