The SKM (Non-Political) and the KMM have announced that members of more than 200 farm unions would march to Delhi on February 13 to press the Centre to accept several demands, including the enactment of a law to guarantee a minimum support price (MSP) for crops. BKU (Doaba) president Manjit Sigh Rai on Monday said his union will join the 'Delhi Chalo' march.