A field experiment was carried out during the agricultural season 2021-2022 at Al-Muthanna Governorate to study the effect of adding humic and fulvic acid in the soil on the availability of N P K in the soil, a simple RCBD experiment was designed with three replicates, it included the addition of a mixture of humic and fulvic acid (0, 5, 10 and 15) for L ha-1. The results showed a significant superiority in increasing the concentration of availability NPK in the soil; the H2 treatment gave the highest rate of 204.00 and 32.76 mg kg soil-1 for NK elements, respectively. The H3 treatment also showed the highest increase in the concentration of significant factors availability NPK in the soil after harvest; it reached 28.62, 14.30 and 155.00 mg kg soil-1, respectively. The highest individual yield was 169.00 g plant-1 when treated with H3, compared to the control treatment, which amounted to 134.80 g plant-1. Keywords: Humic, Fulvic acids, Faba beans, NPK

A field experiment was carried out at the Agricultural Research and Experiments Station of the College of Agriculture, Al-Muthanna University during the summer season 2020. Pots of 15 cm diameter were used for planting the genotypes, with (SS, F-RCBD) and three replications. Ten different genotypes rice were used (FRI, FR2, FR15, FR16, FR17, FR18, FR21, FR25, FR27), as well as the rice varieties, which are Pokkali, Anber-33 and Jasmine, were irrigated by three levels of salty water (4.5, 7.5 and 15 ds/m). The results of the experiment showed that the tolerance of the genotypes FR21 and FR12 to salinity was associated with containing low concentrations of sodium (0.38 and 0.42%) respectively in the shoot, and a high concentration of potassium in the shoot (1.22 and 1.23%) respectively, and this result was reflected in the ratio of potassium to sodium in the shoot total was (3.30 and 2.95%) compared to the salt-tolerant variety Pokkali. Salinity caused a significant decrease in all the studied traits of the genotypes, especially at levels 7.5 and 15 ds/m, in growth traits (plant height, flag leaf area and panicle length), yield and its components (number of productive tillers, weight of 1000 grains and yield per plant). The most potent varieties in salt tolerance were FR12 and FR21, as they gave the highest yield of grains (11.72 and 16.67 g/plant, respectively), flag leave area (30.47 and 27.76 cm2 respectively). Detection for OsHKT4 and OsHKT6 by PCR proved the presence of primary locus that utilized by each gene with successfully fused genes as well as their stability under Iraqi cultivation circumstances, particularly in the case of FR12 and FR21 where OsHKT4 lanes were very obvious (2840 Kb) and the bands of OsHKT6 at (2324 Kb), which resemble to that in Pokkali Japanese salt tolerance rice. These results suggested the variation among investigated rice varieties in their tolerance to salts, where FR12 and FR21 were best in their performance under applied the salt levels conditions.

"The experiment was carried out during growing season (2018-2019) at the Rice Research Station in Mishkhab / AL-Najaf-Iraq, The seeds of 27 genotypes were sowing with the aim of selecting the best economically yielding genotypes for cultivation under the conditions of ALNajaf. The experiment was arranged with a randomized complete block design with four replication. The results showed significant differences between the genotypes for all the traits under study. The G27 genotype showed superiority for traits exceeded, number of grains per panicle, grain yield ton. ha-1 , the biological yield ton. ha-1 and the sterility percentage (%), with averages were 220.17, 13.34, 27.95, and 4.48, respectively. Whereas, the genotype G14 was superior with the characteristics of the number of fertile panicles and the duration of fullness the grain, which averaged 37.00 and 82.25 respectively, while the genotype G13 was significant for weight of 1000 grains (g), and the genotype G21 was superior with the flag leaf area which gave an average 32.45 cm2 . Through this study, genotypes (G1, G2, G12, G15, G16, G17, G18, G21, G25 and G27) showed the best field performance in terms of growth characteristics and the outcome of their selection for the second agricultural season."

The experiment was carried out during growing season (2016-2017) at station of greenhouses, AL-muthanna university- collage of agriculture- second research station (Al-Bander) to study the response of introduced tomato cultivars to different concentrations of potassium under protected agriculture conditions. The research included three cultivars (Pusa ruby - Arka vikash- Arka Alok) and three levels of Potassium Fertilizer (90-180-270 kg/ha-1). The Randomized Complete Block Design with factorial experiment (RCBD) with three replicates. The results showed the superiority of Arka Alok variety over others in plant height 121.76 cm, fruit width 6.82 cm, fruit length 4.23 cm, average fruit weight 130.61g, leaf area 129.5 cm2, the yield per plant 2.16 kg. The potassium level (270 Kg/ha-1) was also significantly higher in plant height 118.79 cm, fruit width 5.477 cm, fruit length 3.536 cm, 84.60 g, leaf area 127.3 cm2, TSS 4.97 and chlorophyll content 406.89 mg.m2 and yield per plant 2.16 kg. While the interaction showed significant difference (Arka Alok × 270 Kg.ha-1) in fruit length was 4.24 cm, chlorophyll content was 374.91 mg. m2 and the yield per plant was 2.82 kg. plant-1

The experiment was carried out during growing season (2016-2017) at station of greenhouses, ALmuthanna university-collage of agriculture-second research station (Al-Bander) to study the response of introduced tomato cultivars to different concentrations of potassium under protected agriculture conditions. The research included three cultivars (Pusa ruby -Arka vikash-Arka Alok) and three levels of Potassium Fertilizer (90-180-270 kg/ha -1 ). The Randomized Complete Block Design with factorial experiment (RCBD) with three replicates. The results showed the superiority of Arka Alok variety over others in plant height 121.76 cm, fruit width 6.82 cm, fruit length 4.23 cm, average fruit weight 130.61g, leaf area 129.5 cm 2 , the yield per plant 2.16 kg. The potassium level (270 Kg/ha -1 ) was also significantly higher in plant height 118.79 cm, fruit width 5.477 cm, fruit length 3.536 cm, 84.60 g, leaf area 127.3 cm 2 , TSS 4.97 and chlorophyll content 406.89 mg.m 2 and yield per plant 2.16 kg. While the interaction showed significant difference (Arka Alok × 270 Kg.ha -1 ) in fruit length was 4.24 cm, chlorophyll content was 374.91 mg. m 2 and the yield per plant was 2.82 kg. plant -1