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- W2339892912 abstract "Eighteen cow-calf herds were used to determine beef cow performance predictability over time to evaluate the effectiveness of Cooperative Extension recommendations on increasing calf preweaning growth performance, and to assess cooperators’ implementation of these recommendations. The data set included 8928 cow records, of which 4379 and 1958 cows had performance records for 2 and 3 consecutive yr, respectively. For each cow herd, adjusted 205-d BW and ratios were calculated within calf gender. Cows within herds were ranked in descending order based on calf-adjusted 205-d weight ratios and then divided into three groups (top, middle, and bottom thirds). When comparing the cows’ consecutive years’ rankings, year and cow age were not significant (P> 0.10). Of the cows that ranked in the top one-third in yr 1, 33% ranked in the top one-third for the next 2 consecutive yr, and 71% ranked in the top one-third at least 1 yr of the next 2 yr. Among the cows ranking in the bottom one-third in yr 1, 27% ranked in the bottom one-third for the next 2 consecutive yr, and 63% ranked in the bottom one-third at least once in the next 2 consecutive yr. The correlations between dam’s BW and weaning BW efficiency and metabolic efficiency across herds were all negative and ranged from -0.70 to -0.45 and -0.61 to -0.21, respectively. These results support the practice of culling cows, even first-calf heifers that rank in the bottom one-third of the herd, based on calf preweaning growth performance after 1 yr." @default.
- W2339892912 created "2016-06-24" @default.
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- W2339892912 date "2004-10-01" @default.
- W2339892912 modified "2023-10-14" @default.
- W2339892912 title "Using Adjusted 205-d Weight Ratios to Predict Beef Cow-Calf Performance12" @default.
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- W2339892912 doi "https://doi.org/10.15232/s1080-7446(15)31334-6" @default.
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