Abstract
Nitrogen (N) deposition is a significant nutrient input to cropland and consequently important for the evaluation of N budgets and N use efficiency (NUE) at different scales and over time. However, the spatiotemporal coverage of N deposition measurements is limited globally, whereas modeled N deposition values carry uncertainties. Here, we reviewed existing methods and related data sources for quantifying N deposition inputs to crop production on a national scale. We utilized different data sources to estimate N deposition input to crop production at national scale and compared our estimates with 14 N budget datasets, as well as measured N deposition data from observation networks in 9 countries. We created four datasets of N deposition inputs on cropland during 1961–2020 for 236 countries. These products showed good agreement for the majority of countries and can be used in the modeling and assessment of NUE at national and global scales. One of the datasets is recommended for general use in regional to global N budget and NUE estimates.
| Original language | English |
|---|---|
| Article number | 488 |
| Journal | Scientific Data |
| Volume | 10 |
| Issue number | 1 |
| DOIs | |
| State | Published - Dec 2023 |
Funding
This work was supported by the International Fertilizer Association (IFA), the UN Food and Agricultural Organization (FAO), and the National Science Foundation. X.Z. is supported by the National Science Foundation (CNS-1739823, CBET-2047165, and CBET-2025826) and the Belmont Forum. F.Z. is supported by the National Science Fund for Distinguished Young Scholars (42225102). The views expressed in this publication are those of the authors and do not necessarily reflect the views or policies of the organizations that conducted or funded this research.