Yes, whether to use zero till or to incorporate crop parts back in depends on what you're trying to manage for. Zero till is great for managing for phosphorus and some aspects of water quality, but it turns out to be less useful or sometimes even detrimental in managing nitrogen. Again, this is a case of getting the right balance between flexibility and rigidity to allow farmers to do the right thing in their particular location, whether the issue in their location is phosphorus or nitrogen.
