FIELD EXPERIMENTS WITH DIFFERENT PLACEMENTS OF FERTILIZERS FOR BARLEY, FLAX AND RAPESEED

Abstract

Fields tests were conducted with commercial fertilizers applied to barley, flax and rapeseed by placement in the row and by placement in different positions away from the row. Emergence of barley was delayed but not substantially reduced by row placement of 33.5–0–0 at a rate of 34 kg N per ha, or by 0–45–0 and 11–48–0 at rates up to 39 kg P per ha. Yields were no greater when the fertilizers were, instead, placed away from the row.Emergence of flax and rapeseed was often reduced to less than half by row placement of 33.5–0–0 at a rate of 17 kg N per ha, or by 11–48–0 at rates of 15 to 20 kg P per ha, and yields were usually greater when damage to emergence was avoided by placing the fertilizers away from the row. When higher rates of fertilizers were used, placement away from the row produced much greater yields than placement in the row.The efficiency of the phosphorus fertilizers varied considerably with the position in which they were placed. When phosphorus fertilizers were placed away from the row, a position 2.5 cm directly below the row was the best for both barley and flax.