Blend the sugar, yuzu juice and zest, lime juice and salt in a blender.
Add the milk and cream. Blend thoroughly.
Refrigerate the mixture for at least 1 hour and up to overnight. Put the container to store the sherbet in the freezer meantime.
Make the sherbet in an ice-cream maker. Store the sherbet in the pre-chilled container.
Alternately, freeze the sherbet in a tightly sealed container. Remove it from the freezer when it has reached a half-frozen state.
Whisk the half-frozen sherbet thoroughly and return it to the freezer until solid.