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.
Shoot and root dry mass of white clover plants grown for 140 d at three sulphate concentrations in the nutrient solution (0, 0.095, and 0.380 mM). Values are presented as means ±SE (n=5). Different letters on bars indicate significant differences of total dry mass between S treatments (P <0.01).
