Two field experiments were applied in one of the agricultural fields belonging to the Rice Research Station in Al-Mishkhab, Al-Najaf province, located at a latitude of 31 north and longitude of 44 east, at a height of 70 m above sea level in silty clay soil during the summer seasons (2019 and 2020). The study aimed to study the effect of Fertilizer combinations on the growth and yield of rice cultivars. The experiment was conducted using The Randomized Complete Block Design (RCBD) according to split-plot design, with three replicates. The cultivars (Jasmine, Amber 33, and AL-forat) occupied the main plots) and the fertilizer combinations occupied the sub-plots, which are symbolized by F1 = chemical fertilizer (as recommended), F2 = spraying with humic acid (2ml.L-1) + fertilizer recommendation, F3= spraying with seaweed extract (4ml.L-1) + fertilizer recommendation, F4 = spraying with humic acid (2ml.L-1) + spraying with seaweed extract (4ml.L-1) with whole fertilizer recommendation, F5 = chemical fertilizer 50% of the recommendation + spraying with humic acid (2ml.L-1), F6 = Chemical fertilizer 50% of the recommendation + spraying with seaweed extract (4ml.L-1), and F7= Chemical fertilizer 50% of the recommendation + spraying with seaweed extract (4ml.L-1) + spraying with humic acid (2ml.L-1). The results showed the superiority of the F4 treatment in plant height, leaf area, number of dahlias, number of grains per dahlia, and grain yield, which gave averages amounted to (103.89 and 102.35 cm), (29.03 and 28.17 cm2), (268.7 and 270.1 dahlia-1), (167.2 and 164.8 grains), and (7.61 and 8.03 tons.ha-1) for both seasons, respectively. As for the cultivars, Anbar 33 cultivar has excelled in plant height, flag leaf area, and the number of grains per dahlia by giving averages amounted to (126.09 and 124.40 cm), (31.60 and 30.48 cm2), and (171.6 and 168.3 dahlias-1), while Al-Furat cultivar has excelled in the number of cultivars per dahlias, the weight of 1000 grains, and the grain yield by giving an average amounted to (280.3 and 276.2 dahlia-1), (23.22 and 23.84 g) and (6.96 and 7.01 tons.ha-1), while the Jasmine cultivar was the lowest in the percentage of infertility which gave an average amounted to (6.44 and 7.07 %) for both seasons, respectively

Seaweed, Humic Acid, Rice Cultivars