THE UNIFORM REGIONAL HARD RED SPRING WHEAT NURSERY The 20 entries in the 1971 uniform regional hard red spring wheat nursery are listed below: Entry C. I. or Year No. Cross or Variety Sel . No. Entered Source 1 MARQUIS 3461 1929 Canada 2 JUSTIN 13462 1959 North Dakota 3 SELKIRK 13100 1953 Canada 4 CHRIS 13751 1960 USDA-MN 5 WALDRON 13958 1964 North Dakota 6 NEEPAWA RL4200 1967 Canada 7 ND140/ND363 ND491 1970 North Dakota 8 do ND506 1971 North Dakota 9 WALDRON/POLK ND501 1971 North Dakota 10 ERA 13986** 1968 USDA-MN 11 FLETCHER 13985** 1968 USDA-MN 12 BONANZA 14077** 1970 DeKalb Ag. Res. 13 WORLD SEEDS 1809** 1971 World Seeds, Inc. 14 BOUNTY 208** 1971 Cargill, Inc. 15 JT*2/4/ND259/CLY//CLY/ ND122/3/JT/5/ND363 ND499** 1970 North Dakota 16 do ND497** 1971 North Dakota 17 PJ60/3/HRY*7/P54//KI84/ 7*WIS250/4/KI84/4*WIS250 WIS271** 1967 USDA-WIS 18 do H678-1-6-9** 1969 USDA-WIS 19 LARK WORLD SEEDS 1651-E** 1971 World Seeds, Inc. 20 NK70Yl4** 1971 Northrup King Semidwarf The list above shows the pedigree, selection number and the year a variety or selection was first entered in the uniform test. Eleven of the twenty entries grown in this nursery were semidwarfs. Data from 21 stations are given in Tables 1-1 to 1-21. The average yield at the two irrigated stations, Bozeman and Carrington, was 53.7 and 62.4 Bu/A, respectively. For the entries grown at the non-irrigated stations, the highest average yield was 80.1 Bu/A at Langdon, North Dakota, while the lowest average yield was 19.9 Bu/A at Lind, Washington. Average yields and bushel weights in 1971 and for the two-year period 1970-71 for entries in this nursery are shown in Table 2. Ten of the eleven semidwarf selections ranked above the check variety Chris. For the third year in a row, Era ranked first with 50.1 Bu/A, while Chris yielded 38.1 Bu/A. NK70Y14 had the best bushel weight with 61.1 Lbs/Bu followed by Bounty 208 and Era with 60.8 and 60.7 Lbs/Bu, respectively. Miscellaneous agronomic and disease data are summarized in Table 3. World Seeds 1809 headed 5 days earlier than Chris, while Fletcher and Era were 2 days later than Chris. The varieties World Seeds 1809, ND506, Bounty 208, H678-1-6-9, Lark, NK70YI4 were the first to mature, having a similar value of 102 days, while Fletcher was the last with 108 days. The semidwarfs were about 15-20 cms shorter than the standard check varieties. Era, Fletcher, WIS271 and Lark possess very good shattering resistance. The entry ND497 had the best 1000 K. weight with 46.5 gms, while Chris was lowest with 35.0 gms. Adult field reactions to leaf and stem rust are given in Table 4-1. Seedling reactions to stem rust are shown in Table 4-2. Stem rust was relatively scarce in the spring wheat region in 1971. All of the varieties, with the exception of Marquis, had adequate resistance. We are beginning to see some evidence of a shift in the leaf rust races since varieties like Chris, Polk, Fletcher and others are being attacked to a greater degree each year. Although the resistance was adequate in the commercial fields for this year, there is concern that the Frontana resistance will not be useful in future years. Ergot appears to be a very serious disease in Waldron. We have observed that as the acreage of Waldron has increased, so has the incidence of the disease.