New Delhi, Aug 8 - Prime Minister Manmohan Singh Saturday said agriculture had been adversely affected in several parts of the country due to the delayed and deficient monsoon this year and urged state governments to draw up contingency plans to deal with the situation without delay.

The prime minister also offered all assistance to the states from the central government to deal with the situation and said the government 'should not hesitate to take strong measures and intervene in the market' if the need arises.

Speaking at a conference of state chief secretaries here, Manmohan Singh said: 'Today the country is facing a difficult situation. The monsoon has been delayed and in many places it has been deficient, though some parts of the country have received normal or excess rainfall.

'Agricultural operations have been adversely affected in several parts of the country causing distress to farmers and their families.

'We should not hesitate to take strong measures and intervene in the market if the need were to arise,' he said.

'The need is for us to act promptly, collectively and effectively. I assure you of our government's full support regarding any additional assistance that may be required in your efforts. In no case should we allow citizens to go hungry,' he said.

The prime minister's statement comes a day after the India Meteorological Department (IMD) said the average monsoon rainfall has been deficient by 25 percent in the country for the monsoon period June 1-Aug 5. The shortfall has been far higher in traditional breadbasket states like Punjab and Haryana.

The prime minister said rice was the worst affected crop due to the erratic monsoon.