The effect of N on nodule development is much more pronounced on common bean than on soybean while soybean nodule initiation is relatively more delayed by N.

• 尽管大豆根瘤初始时间比菜豆的相对地被氮推迟的更多，但在根瘤发育方面则氮对菜豆的影响比大豆更明显。