"n 



1^00 



1,000 



500 



600 - 



400 



200 



oL//. 



11 



12 



16 



17 



Figure 30. 



13 14 15 



Days After Transfer 



Experiment 5. Effect of aeration on ammonium 

 uptake from ammonium-containing complete solutions 

 during the 11- to 17-day period after transfer. 



