[Vegetable crops: ammonia or nitrates? [Italy]]

abonos nitrogenados ammonia ammoniac ammoniaca azote azoto brassica rapa capsicum annuum carciofi cichorium endivia colture idroponiche colture ortive concimi azotati culture hydroponique cynara scolymus growth period hortalizas (plantas) hydroponics italia italie italy melanzane nitrate nitrates nitrati nitratos nitrogen nitrogen fertilizers operations research patate peperoni dolci periodo di crescita ricerca operativa solanum melongena solanum tuberosum spinacia oleracea vegetable crops