Nitrogen Nitrogen is the most important nutrient for yield and must be applied according to levels already present in the soil. Standard soil testing does not measure soil nitrogen, a more complex test is required for assessing nitrogen present in soil. This may be discussed with a member of our fertiliser team. Alternatively, soil nitrogen may be estimated from the AHDB RB209 based on previous management and nitrogen usage. Results from either the soil tests or using the RB209 gives an index similar to Phosphorous and Potassium which can be used to ascertain nitrogen rates. Establishment A small amount of nitrogen is required to boost growth during establishment. Pay particular care to NVZ guidance for autumn sowing. Soil Nitrogen supply Low Moderate High Kg N/ha Spring sown 60 0 0
Summer or autumn Grass and clover swards
30-50
0-30
0
0
0
0
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