Fig. 2

a and b. The effects of treatment with humic acid or fulvic acid and different rates of the recommended dose of phosphorus fertilizer (RDP) on grain and straw yield (Ton/ha) of barley cultivar Giza 123 in the seasons 2018/2019 and 2019/2020. Different letters associated values indicate significant differences between values at p≤ 0.05 according to Duncan's multiple range test