Not only must the employee be employed in agriculture, but he must
be ``primarily'' so employed during the particular workweek or weeks in
which the 13(b)(13) exemption is to be applied. The word ``primarily''
may be considered to mean chiefly or principally (Agnew v. Board of
Governors, 153 F. 2d 785). This interpretation is consistent with the
view, expressed by the sponsor of the exemption at the time of its
adoption on the floor of the Senate (107 Cong. Rec. (daily ed., April
19, 1961), p. 5879), that the word means ``most of his time.'' The
Department of Labor will consider that an employee who spends more than
one-half of his hours worked in the particular workweek in agriculture,
as defined in the Act, is ``primarily'' employed in agriculture during
that week.