492 University of California Publications in Agricultural Sciences [Vol. 3 



History: Property owned by J. J. Johnson. The field has been farmed to grain 

 for probably 60 years. Formerly the rotation was pasture one year, and 

 grain one year; now the practice is grain two years, and pasture one year. 

 Sample collected September 2, 1915. 



Depths of horizons: 



6-A 0-12 inches. 6-B 12-24 inches. 6-C 24-36 inches. 



No. 7 — Altamont Clay Loam 



Location: On the Mission Pass road, a little less than 2 miles south and a little 

 west of Sunol, Alameda County. About 100 feet above the road, between 

 wooden electric power poles nos. 92/30 and 92/31. 



Soil: 0-34 inches — A medium brown clay loam, considered typical by Mr. L. C. 



Holmes and Mr. E. C. Eckman of the U. S. Bureau of Soils. There were 



slight changes in texture. 

 34 inches — A stiff clay horizon. 

 Inspection of a deep cut on the roadside near the location of the sample 



station showed that at 6 feet and deeper there existed a heavy reddish clay. 



In the immediate locality the road sections showed that the parent rock 



was deeper than the 6 foot section. The slope of the land at the sample 



station Avas quite steep. 

 History: Tom Burns, Irvington, owner. Field has been in pasture for the past 3 



years at least, and probably for a much longer time. Sample collected 



September 2, 1915. 



Depths of horizons: 



7-A 0-12 inches. 7-B 12-24 inches. 7-C 24-36 inches. 



No. 10 — 'San Joaquin Sandy Loam 



Location: North Sacramento, Sacramento County; ^4 mile east of tile factory, 

 across the road; opposite poles 57/32 and 57/33, 75 feet southeast from the 

 State Highway. 



Soil: 0-26 inches — A brownish red sandy loam, slightly hog wallowed, and very 

 slightly rolling. 

 26-36 inches — A sandy clay loam. 

 36 inches — A hard hardpan. 

 History : Owner not known, the district now being subdivided, the property being a 

 portion of the old ' ' Hagan Grant. ' ' A near-by resident gave the following 

 information: "The land has not been cultivated for the past 15 years or 

 more. The land is said to have been farmed to grain at one time for a few 

 years, but the 'soil is too light for wheat, it grows nothing but filaree. ' " 

 The principal use has been for cattle and sheep pasture. Sample collected 

 March 28, 1916. 

 Depths of horizons: 



10-A 0-12 inches. 10-B 12-24 inches. 10-C 24-36 inches. 



No. 11 — San Joaquin Sandy Loam 



Location: Four miles west of Lincoln, Placer County, at the "Road Corners," 

 in the southeast field, 10 feet east of the west fence and 60 feet south of 

 the north fence. 



