Two nitrogen oxide (N2O) is the third largest greenhouse gas after carbon dioxide and methane, nitrogen oxide emissions and two of agricultural production has accounted for about 80% of the total emissions of human activities. In recent years, with the increased use of nitrogen fertilizer in agricultural production, agricultural greenhouse gas emissions showed a further expansion of the momentum. The researchers American Michigan State University believe, help farmers around the world using precise fertilizer may be effective emission reduction, thereby reducing the impact of climate change.

The researchers based on the data from all over the world found on soil analysis, the application of nitrogen fertilizer, nitrogen will stimulate soil microbial oxidation produces a more two nitrogen. When the demand for fertilizer than crops, emissions of nitrogen oxide two faster than previously expected rising rate; if the amount of fertilizer applied to the farm to the actual demand of crop and match, then a two oxidation nitrogen production is greatly reduced. That is to say, until the crop nitrogen demand is satisfied, the fertilizer will accelerate the oxidation of two nitrogen. Thus, the fertilizing amount, greenhouse gases and the resulting number and nonlinear correlation, if reasonable fertilization, can achieve both high yield and emission reduction effect.

Phil Robertson the main participants, project of Michigan State University professor pointed out that the ecological system, the current global agricultural emissions accounted for 8% of global greenhouse gas emissions to 14%, to help farmers more precise application of nitrogen fertilizer on nitrogen oxide emissions reduction of two, to cope with global climate change is very important. "Our aim is to find the best way to agricultural fields to slow global warming." As American National Science Foundation "Kellogg biological station long term ecological research (LTER)" project director Robertson said: "our study shows, farmers through the precise application of nitrogen fertilizer, can make a contribution to the global emission reduction."