There are useful sources of knowledge outside of the UK.
SMN sampling
1
Soil N Supply is the nitrogen available to the crop from soil during the season. It is the most important component of estimating a crop's nitrogen requirement.
Yield
1
Crop yield has been a major subject of research and industrial improvement for decades. 
Oats
2
Oats (Avena sativa) is a cereal grown for human and animal consumption. In the UK, both winter and spring varieties are available. In 2021, ~210,000 ha of oats were grown in GB.
landscape
1
Arable crops in the UK make up just under half of the farmed area (3.9M ha out of 9M ha)
As custodians of the landscape all farmers have responsibility to the wildlife and nature on their farms.  There are many networks, organisations, advisors and initiatives seeking to help farmers…