Correct.....producing nitrogen was what I was specifically after in asking that....clover produces nitrogen for OTHER plants....it's actually more of a companion crop really. It will grow just fine in conjunction with other natural for ages. One of the reasons folks start having trouble with clover monocultures after awhile is because their C:.N ratio is out of whack.....Their producing mostly all."N" and no "C".....Over time this causes more and more of a need for carbon to be added back to the soil. All of the excess N being produced and not used begins to promote more and more carbon producing plants