1918.] SOILS FERTILIZERS. 513 



Soils, 1916, pp. Ifl, fig. 1, map 1). — This survey, made in cooperation witli tlie 

 State of Alabama, deals with the soils of an area of 560,000 acres, situated iu 

 western Alabama, bordering the State of Mississippi. "The topography is pre- 

 vailingly very rolling to hilly, with broad, level terraces along the Tombigbee 

 and Sipsey Rivers and a few of the larger creeks and broad, flat first bottoms 

 along all the streams." Drainage is said to be generally well established. 



The county lies entirely within the Coastal Plain province, the soils having 

 been derived from imconsolidated deposits of sands, gravels, and clay ; from 

 slightly consolidated, calcareous deposits; and from alluvial deposits. Nineteen 

 soil types of 13 series are mapped. Ruston fine sandy loam and Susquehanna 

 fine sandy loam predominate, occupying 36 and 17.4 per cent of the total area 

 of the county, respectively. 



Soil survey of Craighead County, Ark., E. B. Dekter and L. V. Davis {TJ. S. 

 Dept. Agr., Adv. Sheets Field Oper. Bur. Soils, 1916, pp. 82, pi. 1, fig. 1, map 1). — 

 This survey deals with the soils of an area of 453,120 acres in northeastern Ar- 

 kansas. Four-fifths of the county consists of flat to gently undulating stream 

 bottoms and terraces, the remainder being occupied by Crowleys Ridge, the 

 topography of which ranges from gently rolling to very hilly. Drainage in the 

 uplands is good while that of the greater part of the lowlands is generally poor. 



The upland soils of the county are derived from loessial material, and the low- 

 land soils from first-bottom and second-bottom alluvial material. The soils 

 range in texture from heavy plastic clay to loamy sand. Thirteen soil types of 

 9 series are mapped. Calhoun silt loam and Sharkey clay predominate, occupy- 

 ing 33 and 14.1 per cent of the total area, respectively. 



Orig'in and properties of agricultural soils, especially of Java, E. C. J. 

 MoHK {Teysmannia, 28 (1917), No. 3, pp. 137-151). — This is a discussion of the 

 factors affecting agricultural soil formation, with particular reference to Java 

 soils. 



Description of the coffee soils of Pasoeroean and Kediri, Java, M. W. 

 Senstius {Meded. Proof stat. Malang, No. 15 {1916), pp. 15). — The physical, 

 mechanical, and chemical properties of these soils are discussed with analytical 

 data. 



Sticky soils (kleefgrond) and red soil (terra rossa) of Limburg [Nether- 

 lands], D. J. HissiNK (Verhandl. Geol. Mijnbouwk. Oenoots. Nederland en 

 Kolon., Gcol. Ser., 2 {1917), No. 5, pp. 197-221) .—Chemical studies on the origin 

 and formation of a sticky clay soil and of red soil in south Limburg are re- 

 ported. 



It is concluded that both the sticky clay and the red soil of the region are 

 products of the weathering of limestone residue. The difference between the 

 two products appears to be indicated by the solubility of weathered silicates in 

 hydrochloric acid. Tl>e red soil consisted of a very basic weathered silicate and 

 was practically laterite. 



The results of further studies of the process of laterization are taken to indi- 

 cate that climate and locality Influence the weathering of limestone by carbon 

 dioxid, and that laterization in the Karst region may be attributed to the basic 

 reaction of the soil solution. 



Soil survey. — I, Pas Geometriques {Dept. Agr. Mauritius, Coil Circ. 1 

 {1916), [English Ed.], pp. -i, pi. 1). — Physical and chemical analyses of the 

 soils of a strip of land 250 ft. wide extending around the Island of Mauritius 

 are reported. 



The soils are mainly calcareous sand, containing from 80 to 89 per cent of 

 calcium carbonate. Sometimes they are mixed with earth, thus reducing the 

 caicium carbonate content to from 21 to 64 per cent. Physically the sandy soils 



