512 EXPERIMENT STATION" RECORD. [Vol.43 



Including rough brokeh land, rough stony land, and mine pit and dump, 38 

 soil types of IS series are mapped, of which rough broken land is the most 

 extensive single type, while Montevallo gravelly loam is the most extensive 

 classified type. It is stated that all the upland soils, which include 18 .series, 

 are in need of liming, deeper plowing, vegetable matter, and steps for the 

 prevention of erosion. 



Soil survey of the Ventura «rea, Calif., J. W. Nelson, W. C. Dean, A. E. 

 KociiEU, E. B. Watson, and E. J. Carpenter {U. S. IJept. Ayr., Adv. Sheets Field 

 Oper. Bur. Soils, 1917, pp. 87, pis. 3, fly. 1, map 1). — This survey, made in co- 

 opei-ation with the California Experiment Station, deals with the soils of an 

 area of 7G8,000 acres lying along the coast in southwestern California and 

 including most of the southern half of Ventura County and a small area in 

 the western part of Los Angeles County. The surface features oi the area 

 vary greatly and include many narrow valleys and broad alluvial deltas, with 

 numerous hilly and mountainous elevations. 



The soils are divided with reference to origin into residual, recent alluvial, 

 and old valley-filling soils, the resent alluvial soils being the most exten.sive. 

 Including rough, broken, and stony land, riverwash, tidal marsh, and coastal 

 beach and dunesand, 32 soil types of 11 series are mapped, of which the rough 

 broken and stony land covers 56.7 per cent of the area, while Yolo fine sandy 

 loam covering 7.1 per cent of the area is the most extensive classified type. 



It is stated that irrigation is not absolutely necessary for the production of 

 crops in the area, except citrus fruits, but is a material aid. Alkali is present 

 in tJie soil over much of the Oxnard Plain and also occurs in the west end of 

 Simi Valley, in small bodies in the towns of Saticoy and Ventura, and in the 

 regit)n southwest of Montalvo. It is always associated with a high-water table, 

 and iiiries in concentration from mere traces to quantities greater than 1 per 

 cent for the surface 6 ft. Sulphate of sodium predominates in the more inland 

 areas, and sodium chlorid prevails near the seacoast. Black alkali apparently 

 is not present. Di-ainage to lower tlie water table and surface flooding to 

 wash out the alkali are riccessary in reclaiming land containing the larger 

 concentrations of alkali. 



Soil survey of Yamhill County, Orcg., A. E. Kocher, E. J. Carpenter, 

 C. V. Ruzek, and J. E. Cooter {U. S. Dept. Ayr., Adv. Sheets Field Oper. Bar. 

 Soils, 1917, pp. 66, pis. 5, fly. 1, map 1). — This survey, made in cooperation with 

 the Oregon Experiment Station, deals with the soils of an area of 445,440 

 acres in northwestern Oregon which lies in the Pacific Coast soil region. The 

 northwestern two-thirds of the county lies on the east slope of the Coast 

 Range and the i"est in the Willai^iette Valley. A large part of the hills is 

 sufficiently smooth for cultivation. Except in a few areas in the valleys, 

 drainage is well established. 



The soils of the area are of residual and sedimentary origin. Including 

 rough stony land, muck and peat, and riverwash, 32 soil types of 15 series 

 are mapped, of which the Aiken clay loam and the Melbourne clay are the 

 most extensive individual types, covering 18.9 and 11.5 per cent of the area, 

 respectively. 



Soil survey of Lubbock County, Tex., J. O. Veatch and H. G. Lewis {U. S. 

 Dept. Ayr., Adv. Sheets Field Oper. Bur. Soils, 1917, pp. 32, 2)ls. 2, fly. 1, map 

 1). — This survey deals with the soils of an area of 555,520 acres in central- 

 western Texas situated in the Llano Estacado division of the High Plains 

 region. The topography in general is that of a nearly level plain. The climate 

 is semiarid. 



The soils are mainly residual in origin. Fine sandy loams and clay loams 

 predominate, the two classes of soils having about the same total area and 



