Can anyone tell me how to or if its possible to somehow rate how much nitrogen could be released back into my fields that have had IC peas in them all summer? I planted 40 lbs to the acre, most fields got going well and established a good root system if that will help

Before and after soil sample would be the only way, in my opinion. Maybe someone in the business like 257 could tell you better.

Auburn says figure 30# nitrogen credit following good crop