The effect of different tillage systems and fertilizer combinations on wheat ( Triticum aestivum L.) growth and some of yield components and its weed Competition

A field experiment was conducted during the agricultural season 2020-2021, at the agricultural extension station in Al-Najmi district, 43 km northeast of the , the center of Al-Muthanna Governorate, to determine the effect of tillage depths and different fertilizer combinations on some traits of wheat ( Triticum aestivum L.) and its weed competition. The experiment was applied according to the arrangement of the split block by two factors using the (RCBD) design and with three replicates. The first factor; four treatments of the tillage systems (0, 10, 20 and 30 cm). The second factor; fertilizer combinations with the control treatment (P0 K0 ,P25 K30 ,P50 K60,, P75 K90,P100K120 kg ha-1). The results of the study showed a significant difference for the treatments of tillage systems in most of the studied traits, weed decreased. The treatment of tillage depth of 10 cm was superior in giving the highest average concentration of nitrogen and phosphorous in the plant. The results also showed the superiority of the fertilizer combination F4 in giving the highest average concentration of nitrogen, phosphorous and potassium in the plant.