An official website of the United States government
Here's how you know
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.
Substrate remaining in soil (■) and 14CO2 evolved from soil (•) treated with individual BTX compounds. Each compound was added at 3 μl · g of soil−1. Each error bar represents 1 SD of three samples.