Hundreds of farmers from different states started reaching Delhi to participate in a 'mahapanchayat' called by the Samyukta Kisan Morcha (non-political) at Jantar Mantar.
All vehicles entering the capital are being checked and police personnel are on 'alert mode,' police said.
Special Commissioner of Police (Law and Order) Dependra Pathak said, "We have made adequate arrangements to ensure that the law and order is maintained.
Traffic movement may be affected in many parts of Delhi as the police have put barricades at border points, officials said.
Anyone trying to gain entry will be checked thoroughly to avoid any undue gathering which may give rise to any untoward situation, police said.
The Samyukta Kisan Morcha and other farmers' groups are organising the 'mahapanchayat' and they will pass through the outer district, which includes Ghazipur border.