A field experiment was conducted at the Grdarasha Research Field station, College of Agricultural Engineering Sciences, Salahaddin University – Erbil using randomized complete block design (RCBD) during the years 2019-2021 to study the effect of five levels 0, 5, 10, 15 and 20 g of dust metals of Erbil steel factory (size 2mm mesh) in combination with compost of solid waste management and sorting of Akre district-Duhok province on growth, yield and chemical composition of Gundelia tournefortii L. The results indicated that powdery metal dust and compost fertilizer significantly increased length, diameter, fresh weight and dry weight of edible portion, and thus escalated the total yield of this plant for the two growing seasons. The highest value (669.07g/m2) of total yield was recorded by application 20g of dust metals combined with compost fertilizer in the second year. Chemical composition of edible portion also affected by fertilizer application Fe%, Co, Ni, Cu, Zn, Se, Hg and Pb ppm. The results reviewed that the addition of mineral dust as nutrients and compost fertilizer significantly enhanced the concentration of these above elements in edible portion. The maximum response was obtained with the high levels of mineral treatments for all studied elements as compared with control.

Gundelia tournefortii L. is adapted to mountains area climate, and the germination of this plant is not easily. This research conducted to study the effect of different seed treatments in various treatment durations in two experiments in petri dish in the laboratory and in seedling tray in the lath house to breaking seed dormancy and germination stimulus. Results indicated that there is significant enhancement of germination by all treatments and the maximum germination percentage was obtained by seed freezing 99.17% in the laboratory and 93.33% in the lath house for all treatment durations 12, 14, 48 and 72 hours. The other parameters of seed germination like germination speed, peak value, mean daily germination, mean germination time, germination value, radicle length, radicle elongation velocity, plumule length, plumule elongation velocity, seedling fresh and dry weight escalated by seed freezing and seed soaking in tap water at all soaking durations 12, 24, 48 and 72 hours. Gundelia tournefortii L. germinated seed was an anatomically examined by paraffin method and calculated diploid number of chromosomes 2n=2x=18 by aceto-carmine squash methods