TABLES (Continued) 



Table 



Number Page 



15 Applied Nitrogen Vs. Discharged 



Nitrogen by Major Tiled Areas 60 



16 Tile Drain Discharge, Nutrient 

 Concentrations, and Total Dissolved 

 Solids Summarized by Physiographic 



Positions, 1967-68 62 



17 Average Tile Drain Discharge, Nutrient 

 Concentrations, and Total Dissolved 

 Solids from Different Soil Series and 

 Physiographic Positions 63 



18 Meanings of Map Symbols Used for 



Designating Drainage Site Classes 67 



19 Average Tile Drain Discharge, Nutrient 

 Concentrations and Total Dissolved 

 Solids According to Drainage Site 



Classes, I968 68 



20 Extract Analysis of a Virgin Alluvial 

 Soil on the West Side of the 



San Joaquin Valley 71 



21 Average Nitrogen Concentrations in 

 Virgin, Irrigated, and Dry Farmed Soil 

 Profiles Along the West Side of the 



San Joaquin Valley 72 



22 Nitrogen in Virgin and Irrigated 



Soil Profiles 74 



23 Residual Nitrogen in Virgin Soil Profiles 



of Alluvial Fan and Interfan Areas .... 7^ 



24 Nitrogen Concentrations in Saturation 

 Extracts and Drainage from Three Tiled 



Fields of the Panoche Series, I966 .... 77 



25 Nitrogen Concentrations in Field 

 Moisture and Drainage from Four Tiled 



Fields, 1967 78 



26 Nitrogen Concentrations In Saturation 

 Extracts and Tile Drainage from 



Irrigated Sites 79 



xiv 



