Crystal Lu
Gridded time-series data of the US cropland distribution from 1850 to 2016
We reconstructed the cropland density maps by harmonizing multiple sources of inventory data and high-resolution satellite images. The...
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Crystal Lu
- Jul 20
- 1 min
County-level crop nitrogen budget history in the US during 1970-2019
Figure. Nitrogen budget aggregated from the eight crops in the U.S. from 1970 to 2019. N inputs include manure (Nman), atmospheric...
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Crystal Lu
- Nov 2, 2017
- 2 min
Data of Global nitrogen and phosphorus fertilizer use in the past half century
Spatial distribution and changes of N/P ratio in synthetic fertilizer application across the world in the years of 1961, 1980, 1990, and...
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Crystal Lu
- Nov 2, 2017
- 1 min
Time series data of nitrogen fertilizer use in the US from 1850 to 2015
Agricultural nitrogen fertilizer use rate increased by 33 folds in the continental US during 1940-2015, with the hot-spots shifting from...
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