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<p>Achieving neutral nitrogen (N) budgets is critical for soil health and sustainable agriculture. Thus, 31 studies were conducted for soybeans (<i>Glycine max</i> L.) throughout the United States, determining N inputs, biological N<sub>2</sub> fixation via <i>δ</i><sup><i>15</i></sup>N natural abundance method, and N outputs, seed N removal. On average, 53% of the N demand was met through N<sub>2</sub> fixation, while the requirement of 62% indicates a significant shortfall for achieving neutral N budgets.</p>

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Nitrogen budgets in US soybean-based agroecosystems

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月16日

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  • Luiz Felipe Almeida,
  • Ignacio A. Ciampitti

摘要

Achieving neutral nitrogen (N) budgets is critical for soil health and sustainable agriculture. Thus, 31 studies were conducted for soybeans (Glycine max L.) throughout the United States, determining N inputs, biological N2 fixation via δ15N natural abundance method, and N outputs, seed N removal. On average, 53% of the N demand was met through N2 fixation, while the requirement of 62% indicates a significant shortfall for achieving neutral N budgets.