R. Hopp

Plant Phenology Observation Networks

Richard J. Hopp, R. Hopp, 1974 .

Modeling Lilac development

R. Hopp, 1976 .

Yield and chemical composition of Cucurbita moschata poir., cultivar butternut, as affected by nitrogen and carbohydrate status of the plants

R. Hopp, S. Merrow, 1965 .

Storage Effects on Winter Squashes, Associations between the Sugar and Starch Content of, and the Degree of Preference for Winter Squashes

R. Hopp, S. Merrow, 1961 .

Computer Mapping in Phenological Analysis

Joseph M. Caprio, Richard J. Hopp, Jack S. Williams, 1974 .