How do you determine the right rate of N?
The Right Rate must take into account:
- Crop demand – each crop has a different need for N, which is also affected by expected or desired yield.
- Soil nutrient supply – all existing sources of N, which may include:
- N from soil organic matter
- N from cover crops, especially legumes
- N carry-over from previous years of manure/compost
As a result, the “right” rate may not look the same for all fields within a farm.