Field Research & Agronomy

AIM

To assess the response of wheat to phosphorus (P) and potassium (K) fertilizer application.

For further information please contact your local area manager or Summit research team.

CONCLUSION

• There was an in-season biomass and yield response to applied P and K. Which was expected due to the low P and K status of the site.
• The highest fertilizer treatment (24 kg P/ha, 40 kg K/ha & 160 kg N/ha) did not have the highest yield.
• Yield ranged between 1.9 -2.5t/ha and was lower than expected considering the favourable rainfall conditions and the paddock being ameliorated at the start of 2018.
• Profits were reflective of the higher grain prices, good overall grain quality and reasonable yield.
• The treatment to optimise yield and profits is 12 kg P/ha, 20 kg K/ha and 70 kg N/ha.