A ESTRA (" T Hrotein is an expensive ingredient of dairy cattle feeds. Overfeeding of protein
contributes to environmental pollution and higher feed costs. Although, high dietary protein …

In order to assess the optimal time of artificial insemination (AI) in relation to ovulation,
lactating dairy cows (n= 732) from herds with rolling herd averages of 9980 to 11,800 kg …

To determine the efficacy of reducing the dosage of GnRH used in a protocol for
synchronization of ovulation and timed AI, primiparous and multiparous lactating Holstein …

The primary objectives of this study were to determine whether a delay in the onset of the
luteal phase, or high milk urea nitrogen at breeding, or both were associated with failure of …

The objectives of this study were to identify and evaluate production and environmental
factors that influence milk urea (MU) in Israeli dairy herds, to analyze the relationships …

Dairy herd improvement test-day data, including milk urea concentrations measured using
infrared test method, were collected from 60 commercial Ontario Holstein dairy herds for a …

Twelve multiparous Holstein cows averaging 122 d postpartum were used in a replicated
Latin square design with 21-d periods. Cows were fed diets containing either low or high …

Fertility is an important component of herd production efficiency, as each additional oestrous
cycle that does not result in a planned pregnancy adds to the cost of dairy farming. In …

The present study was conducted to determine the relationship between milk urea nitrogen
(MUN) and milk yield, fat and protein contents, breed and season effects, parity and days in …

Use of milk urea (MU) concentration as a parameter for detection of nutritional imbalances
requires identification and quantification of nutritional and nonnutritional factors that …