386 



University of California Publications in Agricultural Sciences [Vol.3 



Comparison of Textures. — Table 1 gives the texture as shown on 

 the soil survey map of the locality, as well as the results of the labora- 

 tory check. This texture as given on the map was also judged by me 



50°/c 



.005 .005 .05 .10 .25 .5 /.Omm 



-05 -JO -25 -.5 -\0 -2.0 mm. 

 Size of Particles. 



Fig. 7. Graph showing the results of the Bureau of Soils method of 

 mechanical analysis on the eight samples of San Joaquin sandy loam. 



in the field to be more or less true to the type as mapped. I say more 

 or less true, for the field notes, as given in appendix B, show that in 

 several cases I was unable to obtain in the locality what I believed to 



