Effect of feeding urea on reproductive efficiency in Michigan Dairy Herd Improvement Association herds.

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@article{Ryder1972EffectOF, title={Effect of feeding urea on reproductive efficiency in Michigan Dairy Herd Improvement Association herds.}, author={William L Ryder and David Hillman and Jakob Huber}, journal={Journal of dairy science}, year={1972}, volume={55 9}, pages={1290-4} }