How best to respond to costly fertiliser nitrogen for use in 2022
This study aimed to help cereal and oilseed growers respond appropriately to the large increases in prices of manufactured nitrogen fertilisers for use in 2022.
The economic optimum amounts of fertiliser nitrogen a farmer should apply decreases as the price ratio between grain and fertiliser increases.
Current RB209 recommendations were devised for a ratio of 5 kg cereal grain to 1 kg N and RB209 tables for adjustments extend to a ammonium nitrate price of £483/t.
However, prices of ammonium nitrate in November 2021 have reached £700/t and may go higher before spring 2022
As a result, the RB209 tables have been extended up to £863/t in this review report.
Cereal grain and rapeseed prices have also been strong of late, so the tables have also been extended to prices of £350/tonne and £700/tonne respectively.