noun, noun which may take the genitive case particle 'no', na-adjective
Refers to a plentiful harvest, especially of grain. Often used in agricultural, literary, or celebratory contexts.
今年は豊穣の秋を迎えた。
This year we welcomed an autumn of abundant harvest.
豊穣な大地に感謝する。
We give thanks for the fertile, bountiful land.
豊作 is the more common, everyday word for a good harvest. 豊穣 is more literary and often emphasizes richness and abundance, not just a good yield.
From Middle Chinese 豐穰 (pjuwng nyang). The kanji 豊 means 'abundant' and 穣 means 'good harvest' or 'abundant crops'.