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BIOGRAPHICAL SKETCH. 



Clayton Ord Rost was born near Ord, Valley county, Nebraska, 

 on Nov. 24, 1885. His elementary education was secured in public 

 schools near Nebraska City and at Orchard, Nebr., where he com- 

 pleted the ninth grade. Later he attended the Nebraska Normal 

 College at Wayne and the Nebraska State Normal College at Peru, 

 entering the University of Nebraska in 1908. In 1911 he received 

 the degree of Bachelor of Science with his major in chemistry, and 

 in 1912 the degree of Master of Arts with his major in agricultural 

 chemistry. 



From November, 1912, to August, 1913, he was research assist- 

 ant in agricultural chemistry in the Nebraska Agricultural Experiment 

 Station. In August, 1913, he was appointed assistant chemist in the 

 Division of Soils of the Agricultural Experiment Station, University 

 of Minnesota. He continued advanced work in the Graduate School 

 of the same University, completing the residence and course work for 

 the degree of Doctor of Philosophy in June, 1918. 



Major — Soil Chemistry. 



Minor — Geology (petrography) . 



Thesis — Parallelism of the soils developed on the Gray Drifts 

 of Minnesota. 



Phi Beta Kappa. 



Sigma Xi. 



Publications. 



The determination of total manganese in soils. (With R. A. 

 Gortner.) In Jour. Indus. Eng. Chem. v. 4, No. 7 (1912), p. 522-524. 



The loess soils of the Nebraska portion of the transition region ; 

 IV. Mechanical composition and inorganic constituents. (With F. 

 J. Alway.) In Soil Science, v. 1, No. 5 (1916). p. 405-437, 2 fig. 



The vertical distribution of phosphorus in the urface soil of 

 prairies. (With F. ]. Alway.) In Soil Science, v. 2, No. 5 (1916), 

 p. 493-498. 



The loess soils of the Nebraska portion of the transition region : 

 VI. The relative "rawness" of the subsoils. (With F. J. Alway and 

 G. R. McDole.) /;; Soil Science, v. 3, No. 1 (1917) p. 9-36, 9 plates, 

 4 figs. 



The determination of .soil phosphorus, in Soil Science, v. 4, No. 

 4 (1917), p. 295-312. 



Determination of lime and phosphoric acid in peat soils : Com- 

 parison of Jonkoping with Bremen method. (With F. C. Clap]).) 

 In Soil Science, v. 5, No. 3 ( 1918) , p. 213-219. 



