entity A qualitative analysis of the type of disease symptoms exhibited by seedlings inoculated with stem rust (Puccinia graminis f. sp. avenae) race NA16 during greenhouse trials. Ratings made using the scale from Stakman et al. (1962): immune= 0, very resistant= 1, moderately resistant= 2, moderately susceptible= 3, and very susceptible= 4. Stem rust infection type seedling NA16 acronym variable_of attribute method_of scale_of