1919] 



Pendleton: A Study of Soil Types 



397 



Han ford fine sandy loam.- — Here again in the A horizon the nitro- 

 gen content is fairly uniform (table 15, and fig. 14), with from 0.045% 

 to 0.072%, if the extra typical no. 14, with 0.119%, be left out of 

 consideration. One would suppose these soils to lie higher in their 



% 



0.9 



0.8 



0.7 



0.G 



0.1 



0.2 



0.1 



0.0 



I',l)„ 



N 



22 



23 



24 



14 15 16 19 20 



Fig. 14. Graph showing the percentages of nitrogen and of phosphorus in 

 the nine samples of Hanford fine sandy loam. 



25 Soils 



nitrogen content, as compared with the San Joaquin series, than the 

 results show. The B and C horizons of the Hanford samples contain 

 0.038%; and 0.028% nitrogen, respectively, showing that with the 

 increase of depth there is a more rapid decrease of nitrogen than in 

 the San Joaquin samples, with the nitrogen content of the C horizon 

 of the Hanford only 0.002% above that of the C horizon of the San 



