Mr. Ted Massey:

The figure changed in March of last year. It was changed to reflect the Teagasc publication, Green Book of Major and Micro Nutrient Advice for Productive Agricultural Crops, in 2020 or maybe 2021. This publication, in terms of cattle slurry, sets the figure of 2.4 kg as the average value of nitrogen content for slurry. It goes further and says the values will range from 0 up to 5. That reflects the differences there can be.