This experiment was a continuation of the Spring Wheat North Dakota experiments for 1975 and 1966 and is also related to the Dryland/Irrigated Winter Wheat Experiments done at the Finney County, Kansas Agriculture Experiment Station during 1975, 1966, and 1977. These data were collected as a part of the LACIE Field Measurements Project. More information can be found in the LACIE Field Measurements Project Plan, 1976-77 and in the LACIE Field Measurements Data Library Catalog, Volume III, 1976-77 crop year.