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Relationship between diet ratio of water-soluble carbohydrate (WSC) and nitrogen (N) concentrations and the proportion of feed N intake excreted in urine in dairy cows fed fresh ryegrass-based diets. Dots represent the mean values for individual animals measured and the solid line represents a split line regression (R2 = 0.77) with the breakpoint of 8.94 g WSC/g N in the complete diet (Moorby, 2014).
