The farmers against the Narmada Bachao Andolan leader Patkar had announced that they will show black flags to Kumar, following which heavy police security was deployed at the spot.
But, the protesters still managed to appear on the sides of the road and showed black flags to the Janta Dal (U) president when his cavalcade was passing.
Vishnu Maladari, protesters' leader, said Patkar had invited Kumar to draw political mileage.
But Patkar opposed the Sardar Sarovar Project and Madhya Pradesh was unable to reap its benefits whereas farmers in Gujarat and Rajasthan had been benefited by the project, he said.