UNIVERSITT OF OALIFOENIA PUBLICATIONS-^ (Continued) 



4. Further Studies on the Distribution and Activities of Certain Groups of 



Bacteria in California Soil Columns by Charles B. Lipman. Pp. 113-120. 

 April, 1919 „ . .t „.*^i„.^... .10 



5. Variability in Soils and Its Significance to Past and Future Soil Investi- 



gations, n. Variations in Nitrogen and Carbon in Field Soils and Their 

 Relation to the Accuracy of Field Trials, by D. D. Waynick and I*. T. 

 Sharp. Pp. 121-139, 1 figure in tert. May, 1919 „ 20 



6. The Effect of Several Types of Irrigation Water on the pH Value and 



Freezing Point Depression of Various Types of Soils, by D. R. Hoagland 



and A- W. Christie. Pp. 141-157. November, 1919 S6 



7. A Neiw and Simplified Method for the Statistical Interpretation of Bio- 



metrical Data, by George A. Linhart. Pp. 159-181, 12 figures in text. Sep- 

 tember, 1920 _ 25 



8. The Temperature Relations of Growth in Certain Parasitic Fungi, by 



Howard S. Fawcett. Pp. 183-232, 11 figures in text. March, 1921 .75 



9. The Alinement Chart Method of Preparing Tree Volmne Tables, by Donald 



Bruce. Pp. 233-243. December, 1921 _ „ _ 20 



10. Equilibrium Studies with Certain Acids and Minerals and their Probable 



Relation to the Decomposition of Minerals by Bacteria, by Douglas 

 Wright, Jr. Pp. 245-337, 35 text figures. March, 1922 _ 1.25 



11. Studies on a Drained Marsh Soil Unproductive for Peas, by Paul S. 



Burgess. Pp. 339-396, 21 figures in text. June, 1922 _ 65 



12. The Effect of Reaction on the Fixation of Nitrogen by Azotobacter, by 



Harlan W. Johnson and Charles B. Lipman. Pp. 397-405, 3 figures in 

 text. December, 1922 „ 25 



13. The Toxicity of Copper Sulfate to the Spores of Tilletia tritici (Bjerk.) 



Winter, by Fred N. Briggs. Pp. 407-412, 1 figure in text. November, 

 1923 _ „ „ 25 



14. Influence of Reaction on Inter-Relations Between the Plant and its Culture 



Medium, by J. J. Theron. Pp. 413-444, 12 figures in text. January, 1924 .45 



VoL 5. 1. Growth and Differentiation in Apricot Trees, by H. S. Reed. Pp. 1-55, 



18 figiires in text. September, 1924 . - _ .75 



2. Studies Concerning the Essential Nature of Aluminum and Silicon for 



Plant Growth, by Anna L. Sommer. Pp. 57-81, 2 figs, in text. May, 

 1926 „ „ .30 



3. The Growth of Citrus Seedlings as Influenced by Environmental Factors, 



by Raymond E. Girton. Pp. 83-117, 8 figtures in text. April, 1927 45 



4. Studies of Sulfur in Relation to the Soil Solution, by Wilbur L. Powers. 



Pp. 119-166, 13 figures in text. December, 1927 60 



AOEIOULTURE. — The Publications of the Agricultural Experiment Station are sent gratii 

 to citizens of the State of California. For detailed information regarding them 

 address the Agricultural Experiment Station, Berkeley, California. 



