TRIAL DESCRIPTION AND SUMMARY The 1978 Uniform Regional Hard Red Spring Wheat Performance Nursery (URHRSP) was planted at 23 locations and harvested at 22 in Minnesota, North Dakota, South Dakota, Montana, Idaho, Wyoming, Wisconsin, Washington, Nebraska, and Canada (Table 1-A). The nursery contained 26 wheat entries, 4 checks (3 tall and 1 semidwarf) and 22 experimentals (7 tall and 15 semidwarf). Yield data obtained from Madison and from Mead were not used in the overall average. A hail storm destroyed the trial at Bozeman in 1978. Data from 22 stations are given in Tables 1-1 to 1-22. The average yields at the two irrigated stations, Carrington, North Dakota; and Aberdeen, Idaho were 55.8 and 49.4 Bu/A, respectively. For the entries grown at the non-irrigated stations, the highest average yield was 57.4 Bu/A at Crookston, Minnesota, while the lowest average was 17.8 Bu/A at Madison, Wisconsin. Miscellaneous agronomic and disease data are summarized in Table 2. The entry SD 2273 headed in 58 days, while WSMP 122 headed in 65 days. The maturity range was between 90 to 99 days. The average yield and bushel weight data of all individual entries for 1978. 1977-78. and 1976-78 are shown in Table 3. Six wheats exceeded Era in yield in 1978. In 1977-78. MN 70170 and MN 7125 exceeded Era and NK 75S5511 was equal to Era. ND 550 was the highest yielding normal height line followed by SD 2355 and SD 2273 in 1977-78. Two year data indicate that ND 550, MN 70202, MT 749, and NK 75S5511 are high test weight lines. Seedling reaction to stem rust are given in Table 4-1. Adult field reactions to stem and leaf rust are shown in Tables 4-2 and 4-3, respectively.