1917] SOILS FERTILIZERS. 123 



Including riverwash, 16 soil types of 11 series are mapped, of which the 

 Grundy silt loam, a dark brown prairie soil with heavy subsoil, covers 62.9 

 per cent of the area and is considered the most important soil type in the 

 county. 



Soil survey of the Camden area, New Jersey, A. L. Patrick, C. O. Engle, 

 and L. L. Lee (U. S. Dipt. Agr., Advance Sheets Field Operations Bur. Soils, 

 1915, pp. 45, pis. 5, figs. 3, map 1). — This survey, made in cooperation with the 

 New Jer.sey Geological Survey and Agricultural Experiment Station, deals with 

 the soils of an area of 449,280 acres in the Coastal Plain in southern New Jersey, 

 the topography of which is level to gently rolling. Drainage is effected by 

 numerous small streams. The .soils of the area are derived from beds of 

 unconsolidated sand, sandy clay, gravel, greensand, and marly clay. 



Including riverwash and tidal marsh, 26 soil types of 10 series are mapped, 

 of which the Sassafras sandy loam and sand cover 19.1 and 14.1 per cent of 

 the area, respectively. The Sassafras and Collington series cover the greater 

 part of the area. 



Soil survey of Blair County, Pennsylvania, J. O. Veatch, H. P. Young, and 

 H. P. Coopee (f7. S. Dept. Agr., Advance Sheets Field Operations Bur. Soils, 

 1915, pp. 48, fig- 1, map 1). — This survey, made in cooperation with the Penn- 

 sylvania College and Station, deals with the soils of a well-drained area of 

 341,760 acres In south-central Pennsylvania, the topography of which is in 

 general mountainous and hilly. 



The soils of the county are of residual, alluvial, and colluvial origin. Includ- 

 ing rough stony land, 23 soil types of 13 series are mapped. " The Dekalb soils 

 are most widely distributed, covering about 29.3 per cent of the area of the 

 county." The most extensive soil type is, however, rough stony land, covering 

 17.7 per cent of the area, followed in order by the Dekalb stony loam 15.4 per 

 cent, and Upshur stony loam 12.2 per cent. 



Summary of results of cane culture tests in Java, I-III, J. M. Geerts 

 {Meded. Proefstat. Java-Suikerindus., 5 (1915), No. 21, pp. 593-601/; 6 {1916), 

 Nos. 6, pp. 139-203, figs. 4; 9, pp. 233-305, figs. 5; Arch. Stdkerindus. Nederland. 

 Indie, 23 {1915), No. 52, pp. 1965-1919; 24 {1916), Nos. I4, pp. 413-531, figs. 4; 

 25, pp. 929-1001. figs. 5). — In part 1 of this series of papers on sugar cane ex- 

 periments in Java the author presents a general outline of the methods and 

 aims of experimental work with sugar cane, with special reference to fertilizers. 



In part 2, comparative studies of ammonium sulphate and boengkil, an 

 organic nitrogenous fertilizer made of cinished oil-containing seeds, as nitro- 

 genous fertilizers for cane are reported. 



In general, the better results were obtained with ammonium sulphate. When 

 a part of the sulphate was replaced by boengkil the results were more favorable 

 than when boengkil was used alone. Better results were obtained on light soils 

 with boengkil than on heavy soils. With a fertilization of light soil with 

 boengkil furnisl ing an amount of nitrogen equivalent to 124 lbs. of ammonium 

 sulphate the crop yield decreased about 1 per cent. Fertilization with boengkil 

 was more expensive than with ammonium sulphate. 



In part 3, dealing with 41 comparative tests of ammonium sulphate and sodium 

 nitrate on cane, it was found that with reference to yield the advantage lay 

 with the ammonium sulphate to an average amount of 0.73 per cent for cane and 

 0.24 per cent for sugar. In the 21 tests made on light soil the yields obtained 

 with ammonium sulphate were 1.75 per cent greater for cane and 1.1 per cent 

 greater for sugar. In the remaining 20 tests, made on heavy soil, greater yields 

 were obtained with sodium nitrate to the amount of 0.33 per cent for cane and 

 105033°— No. 2—17 3 



