Projection Factors for Goat Lactation Records
Open Access
- 1 May 1979
- journal article
- research article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 62 (5) , 797-801
- https://doi.org/10.3168/jds.s0022-0302(79)83328-7
Abstract
Projection factors based on production on the last day of sampling were developed for dairy goat milk and fat records. The 305 day lactation was divided into 13 stages varying from 10-40 days. The shortest stages were in early lactation. Sets of factors were developed for 4 ages at freshening, 2 seasons, 2 levels of herd production and 2 breed groups. These classifications were necessary to avoid bias and improve accuracy. Cumulative yield factors were developed with the same grouping of records. These factors are used when production for the last sample day is not available.This publication has 1 reference indexed in Scilit:
- Extending Partial Lactation Milk and Fat Records with a Function of Last-Sample ProductionJournal of Dairy Science, 1979