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.
Element concentration ratios (means in preceding crop divided by means in monoculture) in winter wheat above ground biomass (spring at BBCH 31, (A–C) summer at BBCH 61, (D–F) and grain yield (G–I) field-grown in Central Sweden during two growing seasons (2013 and 2014). Closed bars indicate significant differences (P < 0.05) in element concentrations when comparing the respective preceding crop (flax, rape or ley) and monoculture.
