120 EXPERIMENT STATION RECORD. [Vol. 40 



are of alluvial origin. Exclusive of tidal marsh, 20 soil types of 6 series are 

 mapped. Coxville fine sandy loam and Norfolk fine sandy loam predominate, 

 occupying 18.4 and 11.9 per cent of the total area, respectively. 



Soil survey of Bell County, Tex., W. T. Carter, jr., H. G. Lewis, and II. W. 

 Hawker (U. S. Dcpt. Agr., Adv. Sheets Field Oper. Bur. Soils, 1916. pp. 1,6. fig. 

 1. map 1). — This survey deals with the soils of an area of G93.120 acres situated 

 in the east-central part of the State and lying in the sn-callod Rlack Prairie 

 and Grand Prairie regions of Texas. Although hilly, rough areas occur in cer- 

 tain sections of the county, the topograph; in general is gently rolling and is 

 said to bo representative of an area of about 17,000 square miles. Drainage 

 is well established. 



The upland soils of the area are residual in origin, being derived from cal- 

 careous clays and marls, soft and hard chalks, and hard limestones. Deposits 

 of alluvial soils occur along the streams. Exclusive of rough stony land. 19 soil 

 types of 12 series are mapped. Houston black clay, occupying 24.3 per cent of 

 the total area, predominate s. 



Soil survey of Milwaukee County, Wis., W. J. Gktb and T. J. 1 ><n nkw \i.n 

 (U. S. Dept. Agr., Adv. Sheets Field Oper. Bur. Soils, I9ir>. pp. 82. fig. /. map 



1). — This survey, made in ■ Deration with the Wisconsin Geological and 



Natural History Survey, deals with the soils of an area of 154,240 acree lying 

 in the southeastern pari of the State and adjoining Lake Michigan The topog- 

 raphy of the county consists of a series of three broad, elongated ridges sepa- 

 rated by two shallow, narrow lowland Delta and running parallel to the lake 

 shore. The surface in general is undulating to r< >1 1 i ncr. and an elevation of s 10 



ft. above sea level is attained In the western part Natural surface drainage of 

 the area is very Incomplete. 



The soils of the county consist of glacial deposits ranging in thickness from 

 n few feet to almost 200 ft., aboul 90 per rent of the soil being heavier than 

 loam. In addition t«> pent. 16 soil types representing !> series are mapped. 

 Miami silty clay loam occupying 87.7 per cent of the total area. Miami day loam 

 occupying 30>3 per cent, and Clyde clay loam occupying 12.6 per cent are the 

 predominating types. 



Soil survey of Door County, Wis., W. J. GHB, C. THOMPSON, and II. V. GETS 

 (U. S. Dept. Agr., Idv. Sheets Field Oper. Bur. Soils, 1916, pp. ;). fig. I. mnp 

 /). — This survey, made In cooperation with the Wisconsin Geological and 



Natural History Survey, deals with the soils of an area of 800,160 acres situ- 

 ated in the eastern part of the state and forming part of the peninsula separat- 

 ing Green Bay from Lake Michigan proper. The county lies in the glaciated 

 limestone region, and the topography in general is undulating to gently rolling, 

 while a line of rugged bluffs occurs along the western border, attaining an 



elevation of from 20 to 200 ft. above the lake. The mainland has an elevation 

 Of from 100 to 150 ft. above bake Michigan. Owing to the heavy nature of 

 the soil and subsoil, drainage is said to be deficient in many places. 



The soils of the county are all derived from glacial or lacustrine material 

 or both, and over a large part of the area they are shallow and qui to stony. 

 The surface formation consists of the late Wisconsin drift. Excluding fOUgb 

 stony land, peat, muck', and beach sand. 10 soil typos of 7 series are mapped. 

 Miami loam, Ke . unee loam, and Miami fine sandy loam. Occupying 81.5, IT'.', 

 and 10. '-' per cent <<? the total area, respectively, are the prevailing soil tyi ■ 

 Teat occupies 18.8 per cent of the total area. 



Chemical criteria, crop production, and physical classification in two soil 

 Classes. .1. S. Bl RD (Soil Sci., ■"> [1918), \" ■ '. />/>. ',"■< //.'>>. Investigations COO 

 ducted at the California l'.xporiment Station by l'.urd. BoRgland, and Stewart, 



