Profit from Soil Nitrogen Sampling

Nutrient Requirement: N-Calc

CF Fertilisers N-Calc uses the N-Min result to arrive at the most profitable recommendation for your crops.


With the farmer's yield & quality expectations it will calculate the optimum Nitrogen fertiliser rate for cereals and OSR.

Soil Nitrogen Supply (SNS) = Crop Nitrogen + Soil Mineral Nitrogen (SMN) + Additionally Available Nitrogen (AAN)

N-Calc has been developed from CF Fertilisers own and independent research work. Recently ADAS was commissioned to review, update and improve N-Calc by incorporating all the latest research. It is an ongoing process.

N-Calc recommendations will:

  • Ensure farmers' yield & quality aspirations are met.
  • Allow changes in economic circumstances to be accounted for.
  • Minimise the environmental impact of crop production.
  • Ensure that every £ spent on Nitrogen is well spent.


CF Fertilisers N-Min and N-Calc takes the guess work out of fertiliser calculations

Michael Taylor- Farmer 


 Standard SMN test compared to CF Fertilisers with N-Min & N-Calc service  
  Standard SMN Sampling   N-Min & N-Calc
Practical Sample down to 90cm X Sample to 60cm or maximum rooting depth if less  Yes
Amount of Nitrogen measured   Only soil N at sampling X  

Soil N at sampling plus Additionally Available N (AAN)

Mineraliseable N  None X  Field AAN measured in the laboratory Yes
Nitrogen recommendation  Table in Fertiliser Manual X  N-Calc tailored software validated & updated by ADAS Yes
Interpretation support  Minimal X  FACTS Qualified Advisor (FQA) Yes


Contact us for fertiliser adviceour expert team of FACTS qualified advisers are on hand to provide you with the latest advice in fertiliser planning, nutrient plans and Nitrogen management.

Find out where to access CF Fertilisers N-Min and N-Calc