Figure 1.
Vertical distribution of ammonia nitrogen (a), nitrite + nitrate nitrogen (b), total nitrogen (c), total phosphorus (d), total organic matter (e), Mn(II–IV) (f), pH (g) and oxygen (h) in paddy field soil core.
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.