Response of sunflower (helianthus annuus l.) to phosphorus and nitrogen fertilization under different plant spacing at new valley
By: Uthman, Isam Bakr Ahmad; Awad, Muhammad Mursi Muhammad. Assiut University Bulletin for Environmental Researches. Vol. 13, no. 1 (Mar. 2010), pp.11-18, 8 p.
Subjects: Egypt; Fertilizers; Sunflowers; Wadi Al-Jadid (Governorate)