Table 2.
Nomenclature of treatment groups.
| Treatments | Nitrate only (N) | Sulfate only (S) | Nitrate + sulfate (NS) |
|---|---|---|---|
| Nitrate first | N1 | S2 | N1S2 |
| Sulfate first | N2 | S1 | N2S1 |
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.