County-level crop nitrogen budget history in the US during 1970-2019
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https://figshare.com/articles/dataset/Datasets_for_Half-century_history_of_crop_nitrogen_use_efficiency_in_the_conterminous_United_States_Variations_over_time_space_and_crop_types_/13030436
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资源简介：
This document describes the datasets used for “Half-century history of crop nitrogen use efficiency in the conterminous United States: Variations over time, space and crop types”. The datasets include county-level total nitrogen (N) input rate, nitrogen use efficiency, crop recovered N and N surplus of eight crop types,in the U.S. from 1970 to 2019. The datasets reproduce the results of the manuscript and can be used to explore other topics.
创建时间：
2020-09-30
