A farmer works in a rice field in Pinamalayan, Oriental Mindoro province, the Philippines.

Workers at the International Rice Research Institute sort grain for storage and planting at its headquarters in Los Banos, the Philippines.

Farmers use a threshing machine in a rice field in Calumpit town, Bulacan province, the Philippines.

Chinese agriculturist Zhang Zhaodong, third right, and his team introduce their hybrid rice in the Philippines.