Effect of nitrogen fertilization and time of the harvest on the production and content of nitrates in fresh bean pods (Phaseolus vulgaris L. var. Coco nain)

: French beans were cultivated under different nitrogen fertilizer levels for fresh pods production. Pods were collected after different time intervals. Fresh weight of pods, number and nitrate nitrogen content were determined. Results are presented and discussed. They bring some informations about better cultivation methods to avoid a too high nitrates content in pods.