SOILS FERTILIZERS. 717 



Part 1 deals with the soil itself with reference to the requirements of plants, 

 soil composition, soil organic matter and the changes it undergoes, and the 

 effect of climate on soil and soil fertility. Part 2 deals briefly with soil con- 

 trol by means of cultivation and by determining and overcoming the factor or 

 factors limiting crop gi'owth. Part 3 deals with fertilizers, taking up in turn 

 nitrogenous, phosphatic, and potassic fertilizers ; organic manures, including 

 barnyard manure ; the purchase and use of artificial manures ; and chalk, lime- 

 stone, and lime. An appendix describing methods of soil analysis, and a bib- 

 liography, are also included. 



Soil survey of Limestone County, Alabama, R. T. A. Bueke and A. M. 

 O'Neal, Jk. (U. S. Dept. Agr., Advance Sheets Field Operations Bur. Soils, 

 J914, pp. 41, fig- 1, inap 1). — This survey, made in cooperation with the State of 

 Alabama and issued January 12, 191G, deals with the soils of a well-drained 

 area of 373,760 acres in northern Alabama, comprising uplands and first and 

 second river terraces. With the exception of some rough land in the Elk River 

 basin and small swampy areas, the topography is considered favorable to eco- 

 nomical crop production. 



The soils are of residual and alluvial origin. Sixteen soil types of ten series 

 are mapped, of which the Clarksville silt loam covers 31.3 per cent of the area, 

 the Decatur clay loam and silt loam 1.5..5 and 11.8 per cent, respectively. 



Soil survey of Columbia County, Arkansas, C. Lounsbuet and E. B. Deeteb 

 (U. S. Dept. Agr., Advance Sheets Field Operations Bur. Soils, 1914, PP- 38, fig. 

 1, map 1). — ^This survey, made in cooperation with the Arkansas Experiment 

 Station and issued February 16, 1916, deals with the soils of an area of 496,000 

 acres in the Coastal Plain province in southern Arkansas, the topography of 

 which is gently rolling to rolling. "The drainage is usually adequate in the 

 more rolling areas, but in the lower and flatter areas . . . artificial drainage is 

 needed." 



The soils are primarily of sedimentary origin. Including meadow, 27 soil 

 types of 11 series are mapped, of which the Susquehanna fine sandy loam covers 

 21.2 per cent, the Caddo fine sandy loam 17.5 per cent, and the Ocklocknee very 

 fine sandy loam 13.2 per cent of the area. 



Soil survey of Putnam County, I'lorida, C. N. Moonet, B. D. Gilbert, H. W. 

 Hawker, and W. B. Cobb {TJ. S. Dept. Agr., Advance Sheets Field Operations 

 Bur. Soils, IQI4, pp. 52, pi. 1, fig. 1, map 1). — ^This survey, issued February 15, 

 1916, deals with the soils of an area of 468,480 acres in northern Florida. The 

 county comprises extensive ai'eas of low, level flatwoods in the eastern and 

 central sections and rolling upland areas in the western i)art. Drainage is 

 poorly established, being eifected largely by seepage. 



" The soils of the county range widely in topographic position and drainage 

 conditions from high, rolling, excessively drained soils to swamps and filled-in 

 lakes. They range in texture from sand to clay. There are also cumulose 

 deposits forming peat and muck." Twenty-four soil types of 10 series are 

 mapped, of which the Norfolk fine sand covers 25.4 per cent, the Portsmouth 

 fine sand 19.3 per cent, muck 11.5 per cent, the Norfolk sand 11.4 per cent, and 

 the Leon fine sand 11.2 per cent of the area. 



Soil survey of Nemaha County, Nebraska, A. H. IMeytir, M. W. Beck, E. H. 

 Smies, R. R. Burn, L. T. Skinner, and W. A. Rockie {U. S. Dept. Agr., Ad- 

 vance Sheets Field ODerations Bur. Soil, 1914, pp. 38, fig. 1, map 1). — ^This sur- 

 vey, made in cooperation with the Nebraska Soil Survey and issued February 

 24, 1916, deals with the soils of an area of 257,280 acres in southeastern 

 Nebraska which lies in the glaciated part of the Great Plains province. The 

 topography ranges from almost fiat to rough and extremely dissected. 



