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1932. fertilizers and crop production. 493 pp., illus. New York. 



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1926. fertilizers; the source, character and composition of fer- 

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(41) Yerkes, Guy E. 



1932. propagation of trees and shrubs. U. S. Dept. Agr. Farmers' 

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1937. control of damping-off of conifers. (Abstract) Phytopath- 

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Chadwick, L. C. 



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Nurseryman 62(8): [3]-4, (9): 5-6, (10): 7-8, (12;: [3}-9. 

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 Dillman, Arthur C. 



1931. THE WATER REQUIREMENT OF CERTAIN CROP PLANTS AND WEEDS IN 



the northern great plains. Jour. Agr. Res. 42: 187-238, 

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 Hopper, T. H., Nesbitt, L. L., and Pinckney, A. J. 



1931. THE chemical composition of some chernozem-like soils of 



north Dakota. N. Dak. Agr. Expt. Sta. Tech. Bui. 246, 72 pp., 



illus. 

 Lyon, T. Lyttleton, Fippin, Elmer O., and Buckman, Harry O. 



1915. soils, their properties and management. 764 pp., illus. New 



York. 

 Raber, Oran. 



1937. principles of plant physiology. Rev. ed., 432 pp., illus. New 



York. 

 Rafn, Johannes. 



1915. the testing of forest seeds during 25 years, 1887-1912. 91 

 pp., illus. Copenhagen. 

 Smith, Erwin F. 



1920. an introduction to bacterial diseases of plants. 688 pp., 

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 Stoeckeler, J. H. 



1937. RELATION OF SIZE OF DECIDUOUS NURSERY STOCK TO FIELD SUR- 

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TlLLOTSON, C. R. 



1932. GROWING AND PLANTING HARDWOOD SEEDLINGS ON THE FARM. 



U. S. Dept. Agr. Farmers' Bui. 1123, 28 pp., illus. 

 Trumbower, John A. 



1934. control of elm leaf spots in nurseries. Phytopathologv 24: 



62-73, illus. 

 Wahlenberg, W. G. 



1930. EXPERIMENTS IN THE USE OF FERTILIZERS IN GROWING FOREST 

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 Weakly, Harry E. 



1932. PUMP IRRIGATION AND WATER TABLE STUDIES. \('bl\ AgT. Expt. 



Sta. Bui. 271, 14 pp., illus. 



