Awais, Muhammad Nitrogen and plant population change radiation capture and utilization capacity of sunflower in semi-arid environment. [electronic resource] - Environmental science and pollution research international Jul 2017 - 17511-17525 p. digital Publication Type: Journal Article ISSN: 1614-7499 Standard No.: 10.1007/s11356-017-9308-7 doi Subjects--Topical Terms: AgricultureBiomassHelianthusNitrogenPakistanPhotosynthesisPlant Leaves