Urea v Ammo Trial 2019 Results

This plot trial in spring 2019 looked at pasture responses to Nitrogen, Sulphur and Potash.

The trial was driven by farmers asking whether it was economic to apply Ammo or Potash instead of straight urea in spring.

Three sites were used to test responses on different soil types

  • Marine Clay – Dargaville
  • Wharekohe Silt Loam (pipeclay) – Kokopu
  • Okaihau Gravelly Loam (volcanic) – Okaihau

Results were quite variable across soil types but all sites recorded good responses to N.

Full trial details and results are here

NSK Fert Trial 2019 Results