Some 280,000 refugees remain detained, a month after fighting stopped. A national probe into war abuses was shut down this week.
The isolated junta sought outside aid as death toll projections topped 10,000.
The rice-exporting country has seen a dramatic rebound thanks to years of agricultural research.
Tight supplies reflect population boom and neglect of farming.
Rice shortages are appearing across Asia. In Egypt, the Army is now baking bread to curb food riots.