Sentence:  Purple shoots had grown up from the wheat seeds sown in the furrows. He fell to his knees and dug up a <WSD>radish</WSD>. There was a sound like a bubble popping as the thin roots parted from the earth. 
Meaning of the word marked with <WSD> tags:  The root of this plant used as food. Some varieties are pungent and usually eaten raw in salads, etc., while others have a milder taste and are cooked.