The goal of this study was to use the normalized differential vegetation index to forecast the harvest of several barley cultivars. the two years experiments were carried out during the barley growing season of 2020/2021 and 2021/2022 at Siwa Oasis, Egypt to investigate in the effects of humic (HA) without humic (HA0), 1 kg/ha humic (HA1), 2 kg/ha humic (HA2) and 3 kg/ha humic (HA3) in the yield related traits of barley cultivars of Giza 128 (V1), Giza 129 (V2 ), Giza 132 (V3 ), Giza 133 (V4 ), Giza 2000 (V5 ), S (V6), B (V7 ), H (V8 ), O (V9 ) and BL (V10) and which were obtained from Spanish origins were used in this study, under new reclaimed sandy soil and salinity water conditions. All evaluated characters were greatly by using either humic acid or humectants 3 kg/ha. The Giza 132 barley cultivar achieved the maximum grain output over the course of two seasons (4297 kg/ha in the initial 4135 kg/ha in the second). However, the barley cultivar Giza 132 with treatment of 3 kg/ha humic acid under the Siwa Oasis of Egypt might generate the most economically viable amounts of barley grain and straw. These results offer a thorough grasp of the advantages that humic acid offers for creating sustainable agriculture.