“wheat / barley” in Japanese is 麦, read baku, mugi (ばく, むぎ). It is a Grade 2 Kyōiku kanji, taught in year 2 of Japanese elementary school, and appears in words such as 麦茶 (barley tea).
What does 麦 mean?
畑に麦がそだつ。
Same sound, different character — the classic trap. Compare them side by side: