At Northam in the central wheatbelt of Western Australia in 2014, wheat cv. Eradu was sown into a wheat stubble paddock to evaluate the effects of various rates of fertiliser in combination with Hibrix BB. Agras fertiliser was banded below the seed at sowing at 0, 25, 51, 75 or 99 kg/ha whilst Hibrix BB was applied to half of each plot as a broadcast soil spray at 2.5 L/ha two days after sowing.
The untreated control (no Hibrix BB or Agras) yielded 1.67 t/ha. Increases ranged from 6% to 39%. The Agras only treatments increased overall yields by 7.3%. The Agras plus Hibrix treatments increased overall yields by 17.9%.
The standard farming practice of full rate Agras (99 kg/ha) without Hibrix yielded 1.833 t/ha which was 16.7% greater than the untreated control. In comparison, half rate Agras (51 kg/ha) plus Hibrix yielded 1.992 t/ha which was 18.2% greater than the untreated control.