Canadian fertilizer company Agrium Inc defended the election of its entire slate of directors to the 12-man board as hedge fund Jana, Agrium's biggest single shareholder, called for an investigation of the vote.

Jana said the result was tainted as the votes cast for its five candidates to the board were revoked after Friday's deadline. An official of the hedge fund said Jana had enough votes prior to the deadline to elect one or more candidate.

The hedge fund which owns 7.5 percent of Agrium, wanted the company to break up, reduce cost in its retail division, give back cash to stockholders and enhance disclosure.

Agrium, on the other said, said maintaining the wholesale fertilizer production and retail business as one in fact adds value.

It added that the result of the election was "fair and square" and that the defeat of the rival slate was "pure and simple."