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.
Atmospheric CO uptake rates for surface soils from a 20-year-old nontilled soybean plot. Samples were preincubated with ambient air and amended with deionized water sequentially to vary water content. Data for soils with varied water contents (•) are means ± 1 standard error for triplicate assays; the value for controls (○) is the mean of rates determined in triplicate at five intervals, during which control water contents were varied.
