Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 220 for “"calving"”.
-
An analysis of calving season strategies
Call number: LD2668 .T4 1986 N44
-
An analysis of calving season strategies
Call number: LD2668 .T4 1986 N44
-
Heritability estimates for calving date in Simmental cattle
… Traits analyzed included first and second calving dates, first calving interval and the percentage of cows that returned to calve in the same season as 3-yr-olds. Data were adjusted for effects of percentage Simmental and first-calf calving ease score. At second calving, purebred Simmentals …
-
Adjusting milk production records for age at calving in western Canada
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Dairy, 1960
-
Comparisons of Holstein, Brown Swiss, and Jersey cows for age at first calving, first calving interval, and true herd-life up to five years in seven regions of the United States
… for heat-stress resistance using age at first calving and first calving interval, and to assess breed by region interactions for seven regions of the United States for survival-related traits up to five years of age in Brown Swiss, Holstein, and Jersey cows. Age at first calving and first …
-
Where the Ice Ends: Calving and Ice-Ocean Interactions at Helheim Glacier and Beyond
… of this dynamic mass loss signal is iceberg calving, the detachment of ice into the ocean. Ice dynamic and ice-ocean processes that influence iceberg calving occur across a range of spatial (cm to km) and temporal (minutes to years) scales, making them difficult to capture with existing …
-
Economic analyses of the effects of calving season on beef cow-calf-forage systems
Important implications of the study are: beef cow-calf production is competitive over a wide range of beef prices and it may increase farm returns to feed small amounts of corn silage rather than grow additional pasture even when the weaned steer calf-corn ratio is quite low.
-
Heritability and repeatability estimates of first service conception and first cycle calving in Angus cattle
… Furthermore, a trait termed first cycle calving (FCC) describes the ability of a female to calve within a 21-day period of the due date based on the initial opportunity for conception in the first 21 days of the breeding season. The objectives of this thesis included the further …
-
The Effect of Body Weight and Age at Calving on Milk Production in Holstein Cattle
Made available in DSpace on 2014-12-05T23:07:57Z (GMT). No. of bitstreams: 1 6003890.pdf: 3340365 bytes, checksum: e2529e9d4c26eb9ab223b81ad98f9de9 (MD5) Previous issue date: 1960
-
Constraining calving dynamics of marine-terminating glaciers: Developing 4D data of Store Glacier, Greenland, from repeat UAV photography
… swift retreat and thinning, but the mechanism of calving, which controls this loss, is still not fully constrained. This research uses UAV-borne remote sensing data to analyse the calving events of Store Glacier, west Greenland, in order to develop our knowledge of this important glaciological …
-
The effects of diethylstilbestrol on pelvic area, percent calf crop, calving difficulty and body size relationships in Hereford heifers
Call number: LD2668 .T4 1968 H344
-
Influence of Prepubertal Dietary Protein and Age at First Calving on the Performance, Reproduction and Lactation of Replacement Beef Heifers
… dietary protein level and age at first calving on the performance, reproduction and lactation of replacement beef heifers. Dietary protein levels ranging from 11.7% to 22.6% CP were tested in six experiments using several nutritional management systems. Heifers were managed to calve …
-
Effect of sward height and concentrate supplementation on forage dry matter intake, digestibility and grazing time of spring-calving beef cows
To establish the effect of sward height (SH) and concentrate supplementation on performance of grazing cattle, twenty-four cross bred Angus beef cow-calves were randomly assigned to two SH treatments (4--8 or 8--11 cm) with three supplement levels: 6.24, 3.12 or 0 kg/d. The study was conducted in …
-
Relationships between first lactation milk yield, first calving interval, herd life, lifetime milk production, and descriptive type subtraits in Holstein cattle
… related to first lactation production, first calving interval, herd life, and lifetime milk and fat yields. Variables other than type traits were expressed as deviations from the contemporary average. Heritabilities of type subtraits ranged from .00 to .45. First lactation milk and fat yields …
-
Analysis of newborn calf body measurements and relationship of calf shape to sire breeding values for birth weight and calving ease
… for birth weight (BWTEPD) and first-calf calving ease (CEEPD) and to evaluate the efficacy of calf shape as a selection criterion for reduction of calving difficulty. Birth weight (BW), head circumference (HC), hip width (HW), shoulder width, body length (BL), cannon circumference (CC), …
-
A Microcomputer Simulation to Evaluate Management Strategies For Rearing Dairy Replacements
… for each week of a heifer's life from birth to calving. After calving, milk yield, feed costs, and fixed costs were predicted for first lactation. Variation was estimated for each predicted variable, thus enabling normal distribution of predicted values. The simulation was used to analyze …
-
Connect Store: A fully coupled 3D model of ice flow, calving, subglacial hydrology and ice-ocean interactions applied to Store Glacier, Greenland
… to investigate the coupled dynamics of the ice-calving-subglacial-hydrology-plume system at Store Glacier, a large, fast-flowing tidewater outlet glacier on the west coast of Greenland. Understanding these large outlet glaciers is critical to being able to accurately predict the future evolution …
-
Effects of Vitamin E Supplementation in Late Gestation Cattle and Evaluation of Vitamin E, Cholesterol, and Phospholipid Relationships in Bovine Serum and Serum Lipoproteins
… Se concentrations than Holsteins 3-4 weeks pre-calving and at calving. Selenium supplementation increased blood Se concentrations at calving. Treatment did not affect serum vitamin E concentrations at calving or post-calving, nor blood Se concentrations post-calving. Beef cattle consuming …
Page 1 of 11