the results of a series of trials conducted on 47 seasonal supply dairy farms in the southern north island of new zealand , which indicated a statistically significant overall production response of 2.24 kg milkfat/cow/lactation following a 2-treatment dry-cow anthelmintic drenching programme ( bisset et al. , 1987 ) , were subjected to further analyses in an attempt to identify any management factors or herd characteristics which may have influenced the levels of production response to treatment in individual herds .
C0004927
conducted
C0006147
lactation