Global Fertilizer and Manure, Version 1: Nitrogen Fertilizer Application

The Nitrogen Fertilizer Application data set of the Global Fertilizer and Manure, Version 1 Data Collection represents the amount of nitrogen fertilizer nutrients applied to croplands. The national-level nitrogen fertilizer application rates for crops are from the International Fertilizer Industry Association (IFA) "Fertilizer Use by Crop 2002" statistics database that is available by request from the Food and Agriculture Organization (FAO). The number of crop-specific fertilizer application rates reported for each country ranged from 2 crops (Guinea) to over 50 crops (United States), and the years for which the data are reported range from 1994 to 2001. Spatially explicit fertilizer inputs of Nitrogen (N) were computed by fusing national-level statistics on fertilizer use with global maps of harvested area for 175 crops. The data were compiled by Potter et al. (2010) and are distributed by the Columbia University Center for International Earth Science Information Network (CIESIN).

全球肥料与粪肥数据集（版本1）中的氮肥施用数据集，反映了施用于农田的氮肥养分施用量。国家级作物氮肥施用率数据源自国际肥料工业协会（International Fertilizer Industry Association, IFA）发布的《2002年按作物分类的肥料使用量》统计数据库，该数据库可通过联合国粮食及农业组织（Food and Agriculture Organization, FAO）申请获取。各国报告的特定作物肥料施用率对应的作物数量，从2种（几内亚）到50余种（美国）不等；数据覆盖的年份区间为1994年至2001年。研究团队通过将国家级肥料使用统计数据与175种作物的全球收获面积地图进行融合，计算得到了空间显式的氮肥（N）肥料投入数据。该数据集由Potter等人（2010）汇编，并由哥伦比亚大学国际地球科学信息网络中心（Columbia University Center for International Earth Science Information Network, CIESIN）对外分发。