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



APPENDIX B 

 SOIL SAMPLE LOCATIONS 



Field Notes on the Soil Samples Collected 



No. 1 — Diablo Clay Adobe 



Location: A little over a mile east of San Juan Capistrano, Orange County. On 

 the lower slopes of the hills to the south of San Juan Creek. Sample sta- 

 tion is on a little shoulder running northwest, between Mr. Echenique 's 

 house and the fence following the road to Prima Deshecka Canada. Ap- 

 proximately one-quarter mile from the above house. 



Soil: 0-12 inches — Dark gray adobe; much cracked. 



12-36 inches — Soil becomes gradually lighter in color, approaching a light 



bluish gray mottled with brown. 

 36 inches — The subsoil becomes a silty clay loam in the lower depths. 

 History : The field was pastured up to and including 1906. From 1907 to date 

 the field has been annually planted to barley. Data from Mr. Echenique, 

 the owner. Sample collected August 19, 1917. 



Depths of horizons: 



1-A 0-12 inches. 1-B 12-24 inches. 1-C 24-36 inches. 



No. 2 — Diablo Clay Adobe 



Location: One and three-quarter miles east of southeast of Eastlake Park, Los 

 Angeles. Station is 0.7 mile by secondary road south of Pacific Electric 

 railroad crossing, and 1.2 miles southeast of the Southern Pacific railroad 

 crossing. Station is about 150 feet up the hill to the west of the road, in 

 grain field, and 75 feet south of a 10 or 12 year old eucalyptus grove. 

 The road, going south, emerges from the grove, and is then flanked by pep- 

 per trees. 



Soil: 0-12 inches — Dark gray to almost black, but with a shade of brown rather 

 than a bluish gray. 

 12-24 inches — Dark grayish brown clay adobe, becoming a little lighter with 



depth. 

 24-36 inches — Dark brown with soft, whitish fragments. Fragments probably 

 the partially weathered parent rock, though no outcrops of the rock were 

 seen in the vicinity. Previous to the collection of the sample, Mr. E. C. 

 Eekman, Avho mapped the area as the Bureau of Soils representative, said 

 iri substance : ' ' We have no good Diablo in the area ; the body I am 

 directing you to is as good as any, but it is pretty brown. ' ' 



History: Property owned by Mr. Huntington. Fanned to grain the past 2 

 years; pasture previously. Data from the son of the tenant. Sample col- 

 lected August 20, 1915. 



Depths of horizons: 



2-A 0-12 inches. 2-B 12-24 inches. 2-C 24-36 inches. 



No. 3 — Altamont Clay Loam 



Location: 1.4 miles southeast of Walnut, Los Angeles County, on the shoulder of 

 a low hill, about 200 feet east of the wagon road running south through 

 the hills. The station was selected so that the texture was about right, 

 for in a very short distance there were variations from a heavy dark clay 

 loam or clay adobe to the light clay loams. 



