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By: Parker, M. W. (Marion Wesley), - Borthwick, H. A. (Harry Alfred),Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1942Volume: no.507Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Crop yields Effect of light on Plant photoperiodism PlantsBHL Collections:
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By: Perez-Garcia, Ponciano,Edition:Publication info: 1981Volume:Series:Holding Institution: University of Florida, George A. Smathers LibrariesSubjects: Agronomy Agronomy thesis Ph. D Dissertations, Academic Genetics Plant photoperiodism Soybean UFBHL Collections:
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By: Read, Ralph A., - Bagley, Walter Thaine, - Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)Edition:Publication info: Fort Collins, Colo, Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1967Volume: no.30Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Conifers Effect of light on Forest nurseries Growth Plant photoperiodism Plants SeedlingsBHL Collections:
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By: United States. Agricultural Research Service.Edition:Publication info: [Washington, DC], Agricultural Research Service, United States Department of Agriculture, 1961Volume: no.22-64Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Effect of light on Growth (Plants) Phytochrome Plant photoperiodism PlantsBHL Collections: