Field Research & Agronomy

Nitrogen and phosphorus +/- potassium in wheat

AIM

Part of a continuing trial series to evaluate how cereals, in this case wheat, responds to nitrogen (N), phosphorus (P) and potassium (K) fertilizer applications under different growing conditions.

For more detail on this trial contact your local Area Manager or the Summit Research Team

KEY MESSAGES

• The in-season biomass assessment showed a significant growth response to applied N and P.
• Mace wheat had a significantly positive yield response to N and P fertilizer application.
• The highest yield was 5.07t/ha and a 48% yield increase was noted from N0 to N120.
• The greatest profit was $1138/ha and an extra $312/ha was made from applying N120 compared to N0.

CONCLUSION

• The In-season NDVI biomass assessments showed a strong and significant growth response to P and N  and relatively no effect from K.
• Scepter wheat had a significant yield response to applied N and P.
  The highest yield was 5.07t/ha which received Vigour at N120, P24 and K25.
  On average applying N120 increased yield by 48% and P24 by up to 20% compared to 0N and 0P, with K application having no effect.
• Grain protein was moderate (10.1%-12.4%), and there was a significant increase in protein with increasing N application.