cattle- domesticated bovine animals as a group regardless of sex or age; "so many head of cattle"; "wait till the cows come home"; "seven thin and ill-favored kine"- Bible; "a team of oxen" Bos taurus,cows,kine,oxen calf- young of domestic cattle ...
W. 1947: Fertility level in artificial breeding associated with season, hours of daylight, and the age of cattle. Journal of Dairy Science 30: 817-826.Mercier, E. and Salisbury, G.W. Fertility level in artificial breeding associated with season, hour of daylight, and the age of cattle, ...
As well it describes the meaning of the contribution of the Bronze Age achievements in the sense of formation of a new mode of life among the Andronian population — nomad cattle breeding. Having appeared originally as one of the major parts of mixed economy, later cattle breeding served as ...
The calves perish at a young age. Screening all sires that enter artificial breeding organizations and not using sires that transmit the defect has effectively controlled this condition. Breeding (plant) The application of genetic principles to improve cultivated plants. New varieties of cultivated ...
1) breeding age 配种年龄 1. Based on calving records(1984-1995)of Holstein-Friesian maintained at one of dairy cattle places in XiNing, used the method of statistieal analysis sex of calf of differentbreeding age,parity and breeding month. ...
Figure 3. Diagram showing the sequential timeframe of the reproductive and productive cycles simulated by the Dairy Cattle Breeding Simulation Program (DCBSP). The age of founder cows is sampled from a Weibull distribution and prior lactations to the virtual start date are simulated and stored. ...
Dairy heit-ers are not bred by AI for the same reason that AI has noi been popular in beef cattle; the management of these animals is such that it has traditionally been very much easier tc' breed them by natural service. This does not mean that beef cattle would not benefit by use ...
Potential rates of genetic progress are limited by biological constraints, which along with genetic parameters determine the structure of breeding programs to be employed for maximum genetic improvement. The objective here is to determine whether current progeny-testing programs in dairy cattle, which hav...
plant breeding,science of altering the genetic pattern of plants in order to increase their value. Increased crop yield is the primary aim of most plant-breeding programs; advantages of the hybrids and new varieties developed include adaptation to new agricultural areas, greater resistance to disease...
Breeding Dairy Cattle for Female Fertility and Production in the Age of Genomics by Joel Ira Weller 1,2,*, Moran Gershoni 2 and Ephraim Ezra 1 1 Israel Cattle Breeders Association, Caesarea 38900, Israel 2 Agricultural Research Organization, The Volcani Center, Rishon LeZion 15159, Israel *...