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#1 Federal
Water quality data
- Organization: U.S. Environmental Protection Agency
- Dataset Last Updated: October 24, 2022
The ZTRAX data is a national database of property sales collected by Zillow. The data is available to researchers who submit a research proposal to Zillow. Portions of this dataset are...
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Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 07:00 PM
#2 Federal
Data from: Nitrogen rate influences on protein concentration, yield, and NDVI in spring wheat following pea and cover crop mixture
- Organization: Department of Agriculture
- Dataset Last Updated: January 23, 2026
Tabular data including average wheat grain yield, wheat grain protein concentration, NDVI readings, nugget:sill ratio, nitrogen rate treatment assignments at two scales (subplot and whole plot)...
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Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: September 10, 2026 at 07:48 PM

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