Trial plan

As part of the AICC Crop Nutrition Club 2022, this on-farm winter wheat trial compared N rates from 140 to 260 kg/ha, including the N rate recommended by the Yara N tester amd one treatment with additional Poly N Plus. The trial was facilitated by a local AICC advisor, with support and Agronomics yield map analysis from ADAS.

Results summary: we found little difference in yield between N rates from 140 to 260 kg/ha, indicating that the economically optimal rate for gross margin was around 140 kg/ha, or could have been even lower. The Yara N tester recommended no further N after the first two splits totalling 140 kg/ha, and has been proved right in this case.

This trial result is in keeping with other N rate trials in 2022, which found lower N optima than usual. This is thought to be because the mild, dry winter caused higher mineralisation and lower leaching than usual, leading to high soil residual N levels at the end of winter.

1021801-06-01 CNC22 report anonymised.pdf645.49 KB

Related Organisations

Connected Content

ADAS

ADAS provides ideas, specialist knowledge and solutions to secure our food and enhance the environment. We understand food production and the challenges and opportunities faced by organisations operating in the natural environment

NCSPulse PEP
Nitrogen

Nitrogen is required annually by most crops (except pulses) to achieve yield and quality. Judging how much N to apply is a key part of nutrient management.

NCSPulse PEP
Agronomics Line Trials

  Supporting farmers with robust design and analysis of on-farm experiments in tramline trials.

Farm centric research

Farm-centric research generally involves On-Farm Experimentation and may be better described as 'Farm Action Research', i.e. research conducted at least in part by and for beneficiaries who also farm. 

On Farm Experimentation

On Farm Experimentation (OFE) is increasingly being recognised as having transformative power in improving performance in agricultural systems across the world.

AICC

AICC member agronomists are now the preferred source of advice on over 2.2 million hectares, which is almost half of the UK’s arable land, and the demand for it is stronger than ever

Crop Nutrition Club

Farmers, advisors and researchers working together to understand and improve crop nutrition on-farm

AICC Crop Nutrition Club

AICC Advisors and farmers testing appropriate nitrogen rates and strategies for reduction in light of current high prices.  Brought together by the FarmPEP FIP project