Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you: Don't worry, these resources are plentiful. You take (ゆた) what you want.
Compared to 80 years ago, Japan has become really wealthy.
Kyushu is a place that's rich in nature.
Reading books will enrich your mind.