沃实 is a literary, mostly classical word (Xinhua dictionary glosses it 'soil fertile and produce abundant'). In modern Chinese, you're far more likely to hear
肥沃 (féiwò, 'fertile') for soil and
富饶 (fùráo, 'rich, abundant') for regions. Encountering
沃实 in a subtitle usually signals a historical or wuxia setting.
