TABLE 1.

Characteristics of the soils used

Soil	pHa	Textureb	Composition (%)
			Sand	Silt	Clay	Organic matterc
Brazito	8.5	Sandy loam	76	12	12	1.1
Bear Canyon	6.1	Sandy loam	68	22	10	11.4
Rose Canyon	5.4	Sandy loam	74	18	8	17.1
Madera Canyon	6.5	Sandy loam	78	16	6	3.3

^aDetermined by using a soil-water (1:1) extract. 

^bDetermined by the hydrometer method. 

^cDetermined by the Walkley-Black method (2).