Jan 5 (Reuters) -

* VITERRA PRESENTS REVISED OFFER TO GSU

* VITERRA- OFFER IS A 4-YEAR AGREEMENT, INCLUDES OVERALL SALARY INCREASES OF 4.5% IN YEAR ONE, 3.75% IN YEAR TWO, AND 2.5% IN YEARS THREE AND FOUR

* VITERRA - CO WILL STRONGLY CONSIDER IMPLEMENTING A LOCKOUT SHOULD UNION TAKE ANY ACTION THAT DISRUPTS BUSINESS ACTIVITIES BETWEEN NOW AND THE VOTE Source text for Eikon: