356 TRANSURANIC ELEMENTS IN THE ENVIRONMENT 



TABLE 7 (Continued) 



Plant species 



Range of CR 



Conditions and comments 



Reference 



Wheat (grain) 



Qieatgrass 

 Tumbleweed 



Field studies 

 Corn + cobs 



Potatoes 



Peas (shelled) 

 Native vegetation 



Native vegetation 



10-' to 10- = 



10-' to 10-" 

 10-' to 10"" 



10" 



10" 



10" 



10"' to 10 



10-^ to 10 



SRP; spiked top 1 kg 

 with Am(N03)3 to 

 give 400 pCi/g; highest 

 CR caused by chelate 

 treatment. 



Grown in 3 kg of NTS 

 soil; 0.2 to 2 nCi/g 

 (soil); highest CR 

 caused by chelate. 



Same as for wheat plu- 

 tonium study; ^ " ' Am 

 added as chloride or 

 nitrate to give 

 45 nCi/g(soU); 

 highest CR obtained 

 when added as chloride 

 to a neutral soil. 



Cheatgrass and tumbleweed 

 grown in 1 kg of soil 

 spiked with 25 juCi/g 

 of ^" Am as Am(N03)3; 

 some organics suppressed 

 uptake. 



Same as for plutonium 

 study; 1 fCi/g (soil) 

 of-'"Am 



Same as for plutonium 

 study; 1 fCi/g (soil) 

 of'"' Am. 



Same as for plutonium 

 study; 1 fCi/g (soil) 

 of 'Am. 



Native perennial shrubs 

 inhabiting the NTS 

 environs; mainly sur- 

 face contamination. 



Same as for plutonium 

 study. 



Curium 



Cheatgrass and tumbleweed 

 grown in 1 kg of soil 

 spiked with 25 nCi/g 

 of ""'CmasCm(N03)3; 

 uptake not affected by 

 organics. 



This study 



Schulz, Tompkins, 

 and Babcock, 

 1976a 



Price, 1973 



Hardy, Bennett, 

 and Alexander, 



1977 



Energy Research 

 and Development 

 Administration, 

 1976 



Koranda et al., 

 1973 



Price, 1973 



