Effect of Sulfur, Thiobacillus and Phosphorous application on Canola Yield and Some Soil Chemical Characteristics

One of the major problems in calcareous soils is low efficiency of phosphorous (P) fertilizers due to rapid precipitation. Lowering soil pH is mentioned as a solution for solubility of precipitated P. In order to investigate the effect of sulfur (S) and thiobacillus sp. bacteria and P fertilizer on canola (Brasica napus L. cv. Hayola-401) yield and nutrient concentrations in soil and plant, an experiment was carried out during cropping season 2012-13, in a calcareous soil which was generally poor in P content. The experimental factors were designed in a complete randomized blocks with factorial arrangement in three replicates. The first factor consisted of S, in 4 levels (0, 500, 1000 and 2000 kg.ha-1) as pastille form as elemental sulfur with sulfur oxidizing bacteria (in 2% rate of sulfur weight) and the second factor including 3 P levels (0, 72 and 110) kg.ha-1)as triple superphosphate. There was a positive and significant interaction between S and P levels on seed and aerial part yield and yield component (p