Plants that contribute to nitrogen fixation include the legume family – Fabaceae – with taxa such as kudzu, clovers, soybeans, alfalfa, lupines, peanuts, and rooibos. They have symbiotic bacteria called "Rhizobia" in nodules in their root systems, producing nitrogen compounds that help the plant to grow and compete with other plants. When the plant dies, the fixed
p l æ n t s WORD_BOUNDARY ð æ t WORD_BOUNDARY k ə n t ɹ ɪ b j uː t WORD_BOUNDARY t ə WORD_BOUNDARY n aɪ t ɹ ə d̠ʒ ə n WORD_BOUNDARY f ɪ k s eɪ ʃ ə n WORD_BOUNDARY ɪ ŋ k l uː d WORD_BOUNDARY ð ə WORD_BOUNDARY l ɛ ɡ j uː m WORD_BOUNDARY f æ m ɪ l i WORD_BOUNDARY f æ b eɪ s iː WORD_BOUNDARY w ɪ ð WORD_BOUNDARY t æ k s ə WORD_BOUNDARY s ʌ t̠ʃ WORD_BOUNDARY ʌ z WORD_BOUNDARY k ʌ d z uː WORD_BOUNDARY k l oʊ v ə ɹ z WORD_BOUNDARY s ɔɪ b iː n z WORD_BOUNDARY æ l f æ l f ə WORD_BOUNDARY l uː p aɪ n z WORD_BOUNDARY p iː n ʌ t s WORD_BOUNDARY æ n d WORD_BOUNDARY ɹ uː iː b oʊ z WORD_BOUNDARY ð eɪ WORD_BOUNDARY h æ v WORD_BOUNDARY s ɪ m b aɪ ɑ t ɪ k WORD_BOUNDARY b æ k t ɪ ɹ i ə WORD_BOUNDARY k ɔ l d WORD_BOUNDARY ɹ aɪ z oʊ b iə WORD_BOUNDARY ɪ n WORD_BOUNDARY n ɑ d̠ʒ uː l z WORD_BOUNDARY ɪ n WORD_BOUNDARY ð ɛ ɹ WORD_BOUNDARY ɹ uː t WORD_BOUNDARY s ɪ s t ə m z WORD_BOUNDARY p ɹ ə d uː s ɪ ŋ WORD_BOUNDARY n aɪ t ɹ ə d̠ʒ ə n WORD_BOUNDARY k ɑ m p aʊ n d z WORD_BOUNDARY ð æ t WORD_BOUNDARY h ɛ l p WORD_BOUNDARY ð ə WORD_BOUNDARY p l æ n t WORD_BOUNDARY t ə WORD_BOUNDARY ɡ ɹ oʊ WORD_BOUNDARY æ n d WORD_BOUNDARY k ə m p iː t WORD_BOUNDARY w ɪ ð WORD_BOUNDARY ʌ ð ə ɹ WORD_BOUNDARY p l æ n t s WORD_BOUNDARY w ɛ n WORD_BOUNDARY ð ə WORD_BOUNDARY p l æ n t WORD_BOUNDARY d aɪ z WORD_BOUNDARY ð ə WORD_BOUNDARY f ɪ k s t WORD_BOUNDARY