There are a number of methods of measuring cattle yields; one can measure return in
meat per acre, meat per animal slaughtered and meat produced in relation to total cattle
population. Figures for slaughterings are not complete because only registered slaughter-
ings are available. There seems little case for reckoning returns per acre in an area
where so little grassland has been improved. We have taken as a crude measure the meat
per head of the total cattle population and quarts of milk per head of the population of cows
of two years and over.

 These estimates show little change in the relationship between meat and cattle popula-
tion. The reason for this, however, is partly that we have projected an increase in the
proportion of cows to total cattle for most areas. In terms of yields of meat per acre of
pasture, we expect some increase as more improved pasture comes into being, but we
cannot express the yield factor quantitatively. The relationship between cow numbers and
total milk supplies is more exact. Here the yield factor as between 1958 and 1975 is esti-
mated at 18.7% in Jamaica, 4.8% in Trinidad and Tobago, 10.4% in the Leeward Islands,
Windward Islands and Barbados and 9.4% in British Guiana.