N&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O isotope approaches for source partitioning of N&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O production and estimation of N&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;O reduction – validation with the &amp;lt;sup&amp;gt;15&amp;lt;/sup&amp;gt;N gas-flux method in laboratory and field studies
Biogeosciences