Study of nodulation and nitrogen fixation in introduced cultivars and candidate lines of pea (Pisum sativum L.) grown at two nitrogenous nutrition levels

Symbiotic traits—nodulation, nitrogen fixation, and productivity—were studied in seven introduced cultivars and three candidate lines of pea (Pisum sativum L.). The cultivars grown at two nitrogen nutrition levels differ in traits associated with nodulation and nitrogen fixation. The results can be utilized in pea breeding for nitrogen fixation.