The field experiment was conducted during the spring and autumn seasons of 2021 in the Al-Haritha area, AL- Basra Governorate, to study the response of six genotypes of sunflower (Local, Aqmar, Ishaqi 1, Ishaqi 2, Turki Tarzan and Shmoos) and four levels of nitrogen fertilizer control treatment N0, N1 = (N100 kg. ha -1), N2 = (N200 kg.ha-1) and N3 = (N300 kg.ha-1) according to the complete randomized block design RCBD with three replications in the order of the split-plot design (the levels of nitrogen fertilization were distributed in the main plot and the varieties in the secondary Sub-plot). Results showed the superiority of the Shmoos genotype with the highest average number of leaves that, reached (27.05 and 29.41) leaves. plant-1. while the nitrogen fertilizer effect showed a superior fertilizer level of N3, which gave (26.32 and 29.94) leaves. plant-1. As for characteristic of fertility percentage, there were no significant differences between the genotypes (Local, Aqmar, and Tarzan) for the spring season; it appears the superiority of fertilizer level N3, which gave (93.79 and 91.79), Shmoos genotype was superior with the highest average yield of an individual plant (78.50 and 84.73) gm.plant-1 compared to the local genotype, which gave the lowest average of (44.80, and 51.23) gm.plant-1 for the two seasons, respectively, and N3 level of fertilizer, which gave average (77.82 and 88.88) gm.plant-1 and local composition outperformed the proportion of oil (39.55 and 41.13%) and the Shmoos genotype in the total oil yield (1161.4 and 1461.3) kg.ha-1, while this study showed the superiority of the fertilizer level N0 with the oil percentage, which gave (39.63 and 43.65%). As for the total oil yield, the composition was superior to Shamus by giving the highest mean of oil yield (1161.4 and 1461.3) kg.ha-1 for two seasons, respectively, and the superiority of the fertilizer level N3, which gave the highest oil yield (1,247.6 and 1673.6) kg.ha-1, for two seasons, respectively. Keywords: sunflower, genetic structures, nitrogen fertilizer

A field experiment was conducted during  autumn season 2018 at Al Salam district, Maysan governorate. The aim was to evaluate some growth properties and grain yield of  three varieties of cowpea, Vigna sinensis L. (Local, Patton Boa and Atta E) grown under different levels of potassium sulphate  (0, 43, 86 and 129 kg h-1). The  experimental  design was applied according to the random complete block design in a split arrangement (Split Plots in RCBD). In on hand, the results showed a significant differences between the varieties. The local variety significantly gave highest plant length , leaf area, pods number, seeds number pod-1 and grain yield and which were 60.75cm, 2936.81cm2, 39.60 pod. plant-1, 7.69 seed pod-1, 99.93 g and 4.16 t. h-1 respectively. While the varieties Baton Boa gave highest weight of 100 seeds and gave 37.58 g. In other hand, as compare to the control, the addition of potassium up to 129 kg. h-1 lead to significant increase in plant length, leaf area, pods plant-1, seeds number pod-1 and grain yield plant-1 and total grain yield which were 53.33 cm, 3455.91 cm2, 51.61 pod. plant-1, 8.76 seed. pod-1, 125.93 g. and 5.25 T.h-1 respectively. Whereas, the control treatment (K0) gave the highest weight of 100 seeds (45.11 g). The Interaction between varieties and potassium  had a significant effect on almost  growth and yield characteristics.

The field experiment was carried out during the spring and fall season of 2021 in Basra Governorate, Al-Haritha area. The study aimed to studying the response of 6 genotypes of the sunflower which symbolized by the symbol (V ) V1 = local, V2 = moons, V3 = Ishaqi 1, V4 = Ishaqi 2, V5 = Turki Tarzan , V6 = shmoos, And four levels of nitrogen fertilizer symbolized by the symbol (N0) (N = 0 without fertilizer (control), N1 = ( N 100 kg. ha-1 ) , N2 = ( N 200 kg. ha-1 ) , N3 = ( N 300 kg. ha-1 ). According to the complete randomized block design, R.C.B.D. With three replicates and in the order of Split Plot Design (the levels of nitrogen fertilization were distributed in the main plots and the cultivars in the sub-plot). The results have shown superior to the genotypes shmoos, Moons, and Ishaqi2 compared to other cultivars in the studied traits, and most of the yield components as; plant height, leaf area, weight of 1000 seeds total seed yield. In comparison, the study showed the superiority of the fertilizer level 300 kg N. ha- 1 Significant in the traits mentioned earlier.