A field experiment was conducted at wheat research station, Al-Warka, Al-Muthanna province during the growing season 2014-2015, in order to study the effect of different dates and addition levels of agricultural sulfur to a two cultivars of wheat Triticum aestivum L., on the available iron and its content in plant before planting stage and at flowering. A randomized complete block design with a style of split split plot of three replicates. Sulfur addition at level 2000 Kg S ha-1 had significant a effect on increasing the soil contain of available iron before planting and at flowering because of its effect of decrease soil pH where its values was 7.14 and 7.25 for the both stages before planting and at flowering, respectively. 2000 Kg S ha-1 gave the highest means of iron in the soil, which were 4.15 and 4.05 mg Fe kg-1 soil, the added date in September gave the highest mean for the available iron in the soil before planting which was 3.68 mg Fe kg-1 soil, also the added date in December gave a highest mean for the available iron in the soil which was 3.27 mg Fe kg-1 soil in flowering stage. 2000 Kg S ha-1 and the added date in December dual treatment showed the height mean of iron in the plant 628.7 and 553.44 mg Fe kg-1 dry matter in the flowering stage. IPA-99 gave the highest mean of available iron in the soil in flowering stage, which was 3.20 mg Fe Kg-1 soil. Triple Interaction between the added levels, added dates and cultivars gave the highest means for the available iron before planting and at flowering.
Turkey Muftin Saad, Agric. College, Al-Muthanna Univ.
Abdulkareem Hamad Hassan, Agric. College, AlMuthanna Univ.
Anmar Hammodi Kadhim, Agric. College, AlMuthanna Univ