Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
observations used as calibration data for producing SoilGrids1km predictions [21]. The majority of observations (> 80%) come from the USA National Cooperative Soil Survey Soil Characterization database.
