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Effect of crude protein and solubility on performance and blood constituents of dairy cows
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Department of Animal Nutrition and Management. Swedish University of Agricultural Sciences
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Diurnal variation of rumen ammonia and serum and milk urea in dairy cows at high and low yield
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Effect of dietary protein level, ruminal protein solubility and time after feeding on plasma urea nitrogen and the relationship of plasma urea nitrogen to other ruminal and plasma parameters
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Miettinen PVA, Juvonen RO: Diurnal variations of serum and milk urea levels in dairy cows. Acta agric. scand. 1990, 40, (289–296). DOI: 10.1080/00015129009438563
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Urea concentrations in milk and blood as influenced by feeding varying amounts of protein and energy to dairy cows
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Refsdal AO: Urea in bulk milk as compared to the herd mean of urea in blood. Acta vet. scand. 1983, 24, (518–520). DOI: 10.1186/BF03546724
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Levels of milk urea, plasma constituents and rumen liquid ammonia in relation to the feeding of dairy cows during early lactation
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COI: 1:STN:280:DyaK3c%2Fos1Cmuw%3D%3D, PID: 2596387
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Ropstad E, Vik-Mo L, Refsdal AO: Levels of milk urea, plasma constituents and rumen liquid ammonia in relation to the feeding of dairy cows during early lactation. Acta vet. scand. 1989, 30, (199–208).
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Untersuchungen über die Menge und Zusammensetzung der sogenannten NPN in Milch
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University of Munich, Germany: Thesis
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Wolfschoon-Pombo AF: Untersuchungen über die Menge und Zusammensetzung der sogenannten NPN in Milch. (Investigations on the amount and composition of NPN in milk). Thesis, University of Munich, Germany 1981.
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