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.
Effect of oilseed rape rotation (A) and soil pH (B) on the incidence of clubroot (%) in 41 Plasmodiophora brassicae-infested fields in Germany (2016–2020). (A) Box–whisker plots with medians (middle line), mean-value (×), 25% and 75% quartiles, and minimum and maximum values; (B) Spearman’s rank correlation coefficient.
