No. 2, September, 1921] SOIL SCIENCE 165 



water in 12 soils at 5 or 6 difTerent water contents was determined. The amount of unfree 

 water in a given soil does not vary with the water content but appears to remain constant. — 

 W. J. Robbins. 



1047. Gardner, Willard, and John H. Widtsor. The movement of soil moisture. 

 Soil Sci. 11: 215-232. H fig- 1921. — A mathematical discussion of the movement of water 

 through soil. — W . J . Robbins. 



1048. Guthrie, F. B., A. A. Ramsey, R. M. Petrie, and F. J. Stokes. List of fertili- 

 zers in New South Wales. Agric. Gaz. New South Wales 32: 277-284. 1921.— A list is given 

 showing the composition of fertilizers on the market. — L. R. Waldron. 



1049. Howard, Albert. Investigaciones recentes sobre o arejamento dos solos. [Re- 

 cent investigations on the aeration of soils.] Bol. Agric. (Nova Goa, Portuguese East India] 

 1: 254-264. 1919. — Translation of a paper given before the Indian Congress of Science, 

 1919. — John A. Stevenso7i. 



1050. JuRiTZ, Chas. F. Calciiun cyanamide. Its agricultural use as a fertilizer. Jour. 

 Dept. Agric. Union of South Africa 1 : 765-7(59. 1920. — A discussion of calcium cyanamide 

 is presented, including manufacture and agricultural uses. A review of the literature show- 

 ing its comparative value and cautions to be observed in its use is given. — Lyman Carrier. 



1051. JuRiTZ, Chas. F. Wheat straw and its value to the land. Jour. Dept. Agric. Union 

 of South Africa 1: 712-717. 1920. — The disposal of wheat straw in the various districts of 

 the South African Union is discussed. The value of the material as a fertilizer s discussed, 

 and chemical analyses are given. The utilization of all wheat straw as fertilizer is recommend- 

 ed, by applying either directly to the soil or indirectly by feeding to animals, or using as a 

 litter and then applying the manure to the land. — Lyman Carrier. 



1052. Kazakov, a. Znachenie Viatskikh fosforitnykh zalezhei v dele podniatiia zem- 

 ledeliia v Rossii. [Importance of the Viatka phosphate deposits.] Narodnoe Khoziaistvo 

 [Moscow] 1920: 66-68. 1920. — A systematic survey of the last 2 years has shown that the 

 Viatka phosphate deposits, from a commercial point of view, are superior even to the world- 

 famous South Carolina deposits. While being equal to the latter in its quality and in condi- 

 tions of exploitation, the Viatka or Kama layer is twice as thick as the Carolina layer. There 

 are enormous quantities of cheap fuel (wood) in the vicinity and it is the only deposit in Euro- 

 pean Russia that permits exploitation by the open method with an extensive application of 

 powerful machinery. — M. Shapovalov. 



1053. Keen, B. A. The physical investigation of soil. Sci. Prog. [London] IS: 574-5S9. 

 1921. — A general review of the subject of soil physics together with its relation to agriculture 

 is given under the following heads: (1) The dimensions of the individual particles and the 

 manner of their arrangement, (2) soil moisture, (3) soil temperature, and (4) soil atmo- 

 sphere. — J. L. Weimer. 



1054. LiPMAN, C. B. Report on soils. Jour. Assoc. OfEcial Agric. Chem. 4: 388-389. 

 1921. — A report is presented of progress in determining phosphorus in soils. — F. M. Schertz. 



1055. McCall, a. G. The effect of manure-sulphur composts upon the solubility of the 

 potassium of greensand. Jour. Assoc. Official Agric. Chem. 4: 375-376. 1921. — The potassium 

 of greensand was made water soluble through sulphofication, the most effective compost 

 containing sulphur and manure in equal amounts. When part of the manure was replaced 

 by soil, sulphofication was reduced and consequently less potash was rendered water-soluble; 

 while if all of the manure was replaced by soil only a very small amount of potash was found 

 in the water extract. A greater total amount of water-soluble potash was recovered in the 

 composts containing high-potassium greensand, but a greater percentage of total potassium 



