Frank Buckley

TL;DR: Relationships among milk production, body condition score (BCS), body weight (BW), and reproduction were studied using logistic regression on data from spring-calving Holstein-Friesian dairy cows to identify cows at risk of poor reproduction.

TL;DR: In this paper, genetic correlations between level of BCS at different stages of lactation and total lactation milk production were negative (-0.51 to -0.14) but became positive (0.01 to 0.39) after adjusting BW for differences in BCS.

TL;DR: The results indicate that the optimum strain of Holstein-Friesian cows (HF) will vary with feed system, and there was a strain x FS interaction for yield of milk, fat, and protein.

TL;DR: In this article, the authors developed an LCA model to compare contrasting milk production systems, a seasonal pasture-based dairy farm and a confinement dairy farm, and found that when expressed per unit of milk and per on-farm area, all total environmental impacts were greater for the confinement system compared to the grass-based system.

TL;DR: Strain comparison studies show that genetic selection for increased phenotypic milk production, which is generally accompanied with increased proportion of North American Holstein Friesian genes, was associated with increased milk production per cow, lower body condition score, and greater milk production response to concentrate supplementation at pasture.