A report on Teheran radio said farmers would be paid higher prices for their crops this year.
He did not link the threat and the offer, made in an interview with the Teheran radio monitored here.
When the news was broadcast on Teheran radio a few moments later, the city erupted in joy.
Teheran radio said nine civilians were killed and several injured in the raids.
It heavily damaged or destroyed more than 100 towns and villages, the Teheran radio said.
Teheran radio, which is state-run, said the remaining three Western captives will be freed soon.
The Teheran radio, monitored here, said all attacking jets returned safely from the raids on the southern front.
The Teheran radio said some Iraqis were also killed fleeing through their own minefields.
The sermon was broadcast on the Teheran radio.
The Teheran radio, monitored here, said legislators chanted "God is great!"