1. Shade during growth — effects on chemical composition and leaf color of air-cured burley tobacco;Andersen;Agron. J.,1985
2. The biological significance of phytochrome;Borthwick,1972
3. Greenhouse plant bed design for study of plastic systems;Decoteau,1986
4. Comparison of five mulch-fumigation treatments on yields and quality of tomatoes and muskmelons;Downes,1966
5. The effect of plastic mulch on the microclimate and plant development;Fritschen;Iowa State J. Sci.,1960