Used for a crop or harvest that is larger than usual. Common with crop names such as 米, 麦, りんご, and in phrases like 今年は豊作だ.
This year's rice crop is abundant.
With little typhoon damage, apples had their first bumper crop in ten years.
This year's rice crop is a bumper harvest.
The apple harvest turned out great this year.
The villagers held a festival to celebrate the bumper harvest.