New Delhi, Aug 12 - Internationally renowned Indian agriculture scientist M.S. Swaminathan has put off plans to visit Sri Lanka to help it revive its farm sector until the Tamils there get their due. But New Delhi is determined to help Colombo.

Swaminathan, 84, who visited Sri Lanka and met President Mahinda Rajapaksa in June, said he now felt that there should be a political settlement of the Tamil grievances in the island nation first.

'I don't plan to go immediately (to Sri Lanka) unless there is some kind of political settlement,' Swaminathan told IANS here as he prepared to leave for Sikkim in India's northeast.

'There are people who feel that unless Tamils in Sri Lanka can live in dignity, other things are subsidiary. This is a viewpoint. I have no plans to go to Sri Lanka in the immediate future,' he said.

'There are a lot of people who are displaced. As soon as conditions are conducive, I will see,' said the father of the Green Revolution that radically improved India's food output in the 1960s.

Swaminathan is one of the most respected figures in the field of agriculture. He has won the Ramon Magsaysay Award for Community Leadership and the World Food Prize in Washington.

His change of mind follows criticism in Tamil Nadu against his reported plans to help restore agriculture to its original glory in Sri Lanka's Tamil-majority north.

The critics argue that Colombo needs to first rehabilitate the several thousands of Tamils displaced by a war that ended in May when the military crushed the Liberation Tigers of Tamil Eelam (LTTE).

Tamil activists in Chennai have alleged that Sri Lanka plans to settle soldiers and their families from the majority Sinhalese community in the island's fertile but now battered Tamil areas of the north.

In June, when Swaminathan visited Sri Lanka, President Rajapaksa told him that 'the need of the hour' was to revitalize agriculture and allied occupations for the people of Jaffna, Kilinochchi, Mullaitivu, Vavuniya and Mannar districts in the Tamil-majority north.