2 surface moisture levels (moist and dry) 2 surface tillage conditions (rough and smooth)Two replications were used in a randomized complete block design. Spectral reflectance measurements were made with a Landsat band radiometer (Exotech 100). Radiant temperature and overhead color photographs of the canopies were obtained simultaneously with the reflectance measurements. Oblique color photographs were also obtained. The agronomic measurements of the plots included crop growth stage, percent soil cover, plant height, leaf area index, plant biomass, and surface soil moisture and condition. Grain yields were measured at harvest time.