TABLE 22 



NITROGEN IN VIRGIN AND 

 IRRIGATED SOIL PROFILES 



Virgin SoilsL^ 

 :^?; °^:Proflle: 



Soil 

 Series 



Irrigated Soils 

 NO3-N (rngTrr 



N?; °^:P?^ 



";; ^^: Profile: ^/•c4; ^"-t Profile: ,/ 

 Sites ;Range27;Average3/. Sites . Range!/ ;Average3/ 



6-94 



37 



35 



3 



17 



1/ Virgin and dry-farmed sites. 



5"/ Range of concentrations between different sites . 



^/ Average nitrate-nitrogen in tile zone, depth -weighted. 



TABLE 23 



RESIDUAL NITROGEN IN VIRGIN SOIL 

 PROFILES OF ALLUVIAL FAN AND INTERFAN AREAS 



1/ Selected in the main course of the depositing stream. 



74 



