TABLE 1.

The volume and structure of historical winter wheat trials data

					Averages
Trait	No. samples	No. years	No. vars	No. trials	Trial size (no. vars.)	Trials per year	Replications per var. a	Var. years in trial	Var. replications per year
Yield	74,332	32	1,219	1,472	50.5	46.0	61.0	2.2	22.0
HFN	21,458	31	1,324	586	36.6	18.9	16.2	2.0	8.1
Protein	17,097	31	1,145	691	24.7	22.3	14.9	1.8	8.4
TW	18,452	31	1,211	546	33.8	17.6	15.2	1.7	9.1

Note. HFN, Hagberg falling number; Protein, protein content; TW, test weight; Var., variety.

^a The average number of estimations of the trait for a cultivar in the database.