Zobrazeno 1 - 10
of 240
pro vyhledávání: '"W.G. Jackson"'
Publikováno v:
Small Ruminant Research. 44:141-151
The objective of these studies was to evaluate the seasonal maintenance of body weight (BW) and condition, signs of fescue toxicosis, and reproductive performance of straightbred and cross-bred hair sheep grazing tall fescue or bermudagrass forage. B
Publikováno v:
Theriogenology. 56:357-369
The objective was to determine pregnancy rate and stage of embryonic loss in response to grazing endophyte-free (E-; n = 20) or infected (E+; n = 30) tall fescue in postpartum beef cows with calves. Three weeks before estrus synchronization, cow-calf
Autor:
George A. Perry, S. L. Wood, D. J. Patterson, F.N. Kojima, Matthew C. Lucy, J.M. Burke, E.L. Piper, Donald E. Spiers, Michael F. Smith, W.G. Jackson, B E Salfen
Publikováno v:
Biology of Reproduction. 65:260-268
The objective of the experiment was to examine the interaction of endophyte-infected tall fescue and environmental temperature on follicular and luteal development and function in beef heifers. Heifers were fed endophyte-free or endophyte-infected ta
Autor:
Ivette Duenas, J R Miesner, R. Albin, A.H. Brown, W.G. Jackson, M.A. Brown, Max Paape, R. Adams
Publikováno v:
The Professional Animal Scientist. 14:127-132
Angus (A), Brahman (B), and reciprocal cross cows (AB, BA) were sampled in 1994 (67 head) and 1995 (47 head) to evaluate the effect of breed and forage on the presence of mastitis-causing organisms (MCO). In 1994, cows were managed on either endophyt
Publikováno v:
The Professional Animal Scientist. 13:90-94
Three years of data from 42 purebred Angus (AA) and 50 Brahman (BB) cows bred to purebred Beefmaster (BM) and purebred Brahman (BB) bulls were used to evaluate both breed of sire effects and different forage systems. Cows and calves were managed on o
Publikováno v:
The Professional Animal Scientist. 9:178-182
Weekly horn fly (Diptera:Muscidae) counts were recorded on 125 Angus, Brahman, and F1 reciprocal crossbred heifers grazing endophyte-infected tall fescue or common bermudagrass during the fly seasons in 1990 and 1991. Direct heterosis, maternal breed
Publikováno v:
The Professional Animal Scientist. 9:120-126
Overnight shrinkage at three different ages — weaning, yearling, and long-yearling — was evaluated in Angus (AA), Brahman (BB), and reciprocal cross calves (AB, BA) over a 4-yr period to determine changes in precision of estimates of weights and
Publikováno v:
The Professional Animal Scientist. 8:58-65
Reproductive performance of approximately 80 purebred Angus and 80 purebred Brahman managed on either endophyte-infected tall fescue or common bermudagrass was evaluated over 4 yr. Calving percentage averaged 7.6% higher on common bermudagrass compar
Publikováno v:
Journal of animal science. 79(7)
Milk yield and quality were observed on 93 Angus, Brahman, and reciprocal-cross cows over 3 yr to evaluate the interactions of direct and maternal breed effects and heterosis with forage environment. Forage environments were common bermudagrass (BG),
Publikováno v:
Journal of animal science. 78(3)
Reproductive and preweaning data on 190 Angus (A x A), Brahman (B x B), and reciprocal-cross cows (A x B and B x A) and 434 two- and three-breed-cross calves managed on common bermudagrass (BG), endophyte-infected tall fescue (E+), or a combination o