Effect of Potassium levels on the growth and yield of wheat varieties (Triticum eastivum L.)

Abstract Afield experiment was conducted in the Um Al-Akf area in the northeast of Al-Muthanna Governorate (in the two seasons (2018-2019) and (2019-2020) to study effect of potassium levels on the characteristics of four varieties of wheat, and the experiment was applied according to the arrangement of the Split plates (split-plots design) Using the R.C.B.D and with three replications, Where the results of the statistical analysis showed that there was a significant effect of potassium levels in some of the studied characteristics, as the Samadhi level exceeded (120 Kg ha−1 ground + 9000 mg L−1 spraying) in the characteristic of plant height for the second season and the characteristic of leaf area (cm2) for the first season reached (67.46 cm and 19.12cm2) respectively, While the level (120 Kg ha−1 ground + 12000 mg L−1 spraying) for the first season in terms of dry weight (g plant−1) was 25.57 g plant−1, As for the effect of the varieties, the variety was superior to Babel in the two characteristics, plant height (67.84 and 68.78) cm and spike length (10.91 and 10.87) cm for both season, while the cultivar Abu Ghraib outperformed the chlorophyll content of the first season, it reached 19.55 Spad.