Abstract: In some embodiments, a composition includes a nitrogen fertilizer, a reactive oxygen species, and a reactive oxygen species inducer. An effective amount of the reactive oxygen species is sufficient to increase reactive oxygen species in a plant to induce increased nitrogen uptake efficiency by the plant and increased nitrogen utilization efficiency in the plant. In some embodiments, the reactive oxygen species inducer is a black walnut extract. In some embodiments, the reactive oxygen species inducer is hydrogen peroxide.