212 EXPERIMENT STATION RECORD. [Vol.87 



the Carrington silt loam, Wabash silt loam, and Marshall silt loam cover 46.5, 

 19.6, and 1G.5 per cent of the area, respectively. 



Soil survey of Hamilton County; Ohio, A. L. Goodman, E. R. Allen, and 

 S. W. Phillips {U. S. Dept. Agr., Advance Sheets Field Operations Bur. Soils, 

 1915, pp. 39, fig. 1, map 1). — This survey, made in cooperation with the Ohio 

 Experiment Station, deals with the soils of an area of 260,480 acres in south- 

 western Ohio, the topography of which ranges from level or nearly flat to hilly, 

 ridgy, and rough. Drainage in general is said to be well established. 



The soils consist of upland, terrace, and bottom land. " The soil-forming ma- 

 terial is complex in origin as well as in mode of accumulation. It is partly 

 glacial drift or till, partly residual material left in the decay of limestone and 

 calcareous shales, partly a smooth, silty material whose origin is not thoroughlj' 

 understood, and partly alluvium." Seventeen soil types of ten series are 

 mapped, of which the Cincinnati silt loam and the Fairmont silty clay loam 

 cover 38 and 24.8 per cent of the area, respectively. 



Agricultural possibilities of Ohio peat soils, A. Dachnowski (Jour. Atner. 

 Peat Soc, 9 (1916), No. 1, pp. 10-21). — This is a report of rather general ob- 

 servations on the necessary fertility treatment of Ohio peat soils, including culti- 

 vation, liming, fertilization, drainage, and cropping. It is concluded that " the 

 essential objects are, aside from more effective organization, an increase in 

 smaller farms, a greater use of fibrous soils for pasture, meadow, or general live- 

 stock farming, and more intensive farming and greater specialization upon the 

 better, suitable types of peat and muck." 



Study of the vine-growing soils of Vevey [Switzerland], I. Anken (Ann. 

 Sci. Agron., J,, ser., 5 (1916), No. 1-6, pp. 1-156. pis. .?. figs. ^).— Tliis is the re- 

 port of a survey of the geolog>-, origin, mineralogy, and mechanical, physical, 

 and chemical composition of the vine soils of the district of Vevey on the 

 northern slioro of L:ikt> Cciuna in Switzerland. 



The soils of Southern Rhodesia and their origin, H. B. Mavfe (Rhodesia 

 Agr. Jour., H (1911), No. 1, pp. 8-2S).— The soils of Southern Khodosia are 

 discussed as red clay, granite, sandy, and black soil, and mechanical analyses of 

 samples of the last three are given. It is stated that the soils of the regions are 

 mainly the result of the decomposition of rocks and that clayey matter consisting 

 of hydrated aluminum silicates is the chief product of that decomposition. 



The soil mulch, L. E. Call and M. C. Seweli- (Jour. Anier. Soc. Agron., 9 

 (1917). No. 2. pp. 49-61). — Experiments conducted at the Kansas Experiment 

 Station, in which moisture determinations were made to a depth of several feet 

 on cultivated and uncultivated, uncropped areas, kept free from weeds, are 

 reported. 



The results are taken to indicate that " a cultivated soil is no more effective 

 than a bare uncu tivated soil in preventing evaporation. Cultivation conserves 

 soil moisture by the elimination of weeds and by preventing run-off. The 

 development of nitrates may be as extensive without cultivation as with 

 cultivation." 



Halation between indications of several lime-requirement methods and 

 the soil's content of bases, C. J. Schollenberger (Soil Sci., S (1917), No. S, 

 pp. 279-288, figs. S). — Laboratory experiments conducted at the Ohio Experi- 

 ment Station on two soils well supplied with basic material other than car- 

 bonates and data obtained from analyses of soil from the .'i-year rotation fertility 

 experiment plats at the station are reported. The soils were neutral clay loam 

 deficient in organic matter, alkaline black clay, and acid silt loam. 



" Experiments upon acid-extracted and washed soils and upon field-treated 

 soils demonstrate that the vacuum method is. of the number studied, the most 

 nearly quantitative method which is at the same time universally applicable. 



