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.
Relationship between crop relative yield (RY) and pH only for spring oats (a), spring beans (1989 data only) (b), winter oilseed rape (c), potato (d), winter wheat (e) and spring lupins (f) at the Rothamsted (⬤) and Woburn (○) sites; regression fit for Rothamsted are given with solid lines and for Woburn with dashed lines. For actual crop yield (t ha−1) refer to Table 6, Table 7.
