Impact of different levels of foamed sulfur and Nitrogen fertilizer (Urea) on soil reaction (pH) and yield of wheat (Triticum aestivum L.) cultivar (IBAA 99)

Abstract

An experiment was conducted in one of the agricultural lands of Al-Muthanna Governorate for the agricultural season 2018_2019, to find out the effect of adding one of the soil conditioners represented by foamed sulfure by three levels (0, 1000 and 2000) kg S ha-1 , addition of nitrogen fertilizer (Urea) CO(NH2)2 at three levels (200, 400 and 600) kg N ha-1 to the soil in the degree of soil reaction (pH) and the yield of wheat cultivar (IPAA 99). The treatments within the experimental units were arranged according to the Randomized Complete Block Design (RCBD) with four replicates, so the total experimental units were 36 experimental units, where the level of addition of 2000 kg N ha-1 of foamed sulfur and the level of 600 kg N ha-1 of nitrogen fertilizer (Urea) were significantly higher, to give them the lowest averages for the soil reaction (pH) of 7.13 and 7.38 at germination and 7.19 and 7.29 at the flowering stage for each of the sulfur and nitrogen fertilizers, respectively, compared to the comparison treatment. Both levels were significantly superior in giving them the highest averages for some growth characteristics, and the yield amounted to(343 and 304 spikes m-2 , 65 and 62 grains of spike-2 , 43.58 and 42.20 gm, and 4.88 and 478 tons ha-1 and 25.60 and 24.32%, for the characteristics spikes numbers, the grains spike number, 1000 grain weights, grains yield and the protein content percentage in grains, respectively, for both levels. Keywords: foamed sulfur, Nitrogen fertilizer (Urea), soil reaction (pH), yield, wheat (Triticum aestivum L.), IBAA 99cultivar.