“agricultural worker” means a person employed under a contract of service or apprenticeship whose work under such contract is or includes work in agriculture, but does not include a person whose work under such contract is mainly domestic;
“agricultural employer” means a person who carries on the trade or business of agriculture and who employs other persons as agricultural workers for the purposes of such trade or business;
“agriculture” includes dairy-farming and the use of land as grazing, meadow, or pasture land or orchard or osier land or wood-land or for market gardens or nursery grounds.
