Dennis Robert Hoagland, born April 

 2, 1884 at Golden, Colorado. A.B. Stan- 

 ford University, 1907, M.A. Univ. of 

 Wis., 1913. Asst. in Agricultural Chem- 

 istry, Univ. of Calif., 1907-10; Chemist, 

 Referee Board, U.S.D.A., 1910-12; Asst. 

 Prof. Agricultural Chemistry, Univ. of 

 Calif., 1913-20; Associate Prof, and As- 

 soc. Chemist, Experiment Station, 1920- 

 25; Prof. Plant Nutrition 1927—; Chem- 

 ist, Experiment Station, 1925 — ; Head, 

 Division of Plant Nutrition, 1921 — . 

 Member A.A.A.S., Western Soc. Soil Sci. 

 (Pres. 1924) ; Bot. Soc. Amer., Amer. Soc. 

 Plant Physiol. (Pres. 1932; Stephen Hales 

 award 1930) ; West. Soc. Nat. (Pres. 

 1931) ; Nat. Acad. Sci. Consulting editor. 

 Soil Science; Editorial Board, Ann. Rev. 

 Biochemistry; Sectional Vice-president, 

 Internal. Botanical Congress, 1935. Board 

 of Collaborators, U.S.D.A. Regional Lab- 

 oratories, Ithaca, N. Y., Riverside, Calif. 



