。
The rice crop is good this year.
Literal
Rice-production [topic-は] this-year bumper-harvest is.
豊作 is 'bumper crop/good harvest,' the positive counterpart to 凶作 ('crop failure'). 米作は sets up the topic; 今年 functions as an unmarked time adverb ('this year') without an explicit particle, a common stylistic choice for time expressions. Both 今年は and bare 今年 are natural here.