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.
Catalase activities and urease activities in soil layers of different sample plots. Note: lowercase letters represent the significance of differences between soil layers within a sample plot; where the letters are different, there is a significant difference (p < 0.05). Uppercase letters represent the significance of differences between sample plots for the same soil layer; where the letters are different, there is a significant difference (p < 0.05).
