Milking cows two or three times a day for 7 days a week is time-consum
ing and a heavy load for the farmer. Many high-yielding cows enter the
milking parlour with heavy udders. To be able to increase the milking
frequency and to decrease the physical labour requirements automatic
milking systems are developed. In 1996 about 45 installations are bein
g used on practical farms, mostly on farms in the Netherlands bur also
in Belgium, Canada, France, Germany, Japan and the UK. The technical
performance has gradually developed over the last four years to a leve
l that allows routine operation without human interference, except for
two or three periods per day in which some remaining unmilked cows ca
n be milked with human help in attaching the cluster. The integration
in the farms however and the means to achieve the planned milking freq
uency need attention. Further research is necessary on the production
of milk with a good quality and to develop the possibility of treating
the teats with a disinfection fluid and tear cleaning. Though there a
re problems to be solved it can be expected that these systems will be
introduced on a substantial number of dairy farms in the next few yea
rs. (C) 1997 Elsevier Science B.V.