Experiment 3 — Greenhouse. 



Experiment 4 — Greenhouse. 



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10 



11 



12 



13 



14 



15 



16 



17 



18 



19 



20 



21 



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24 



66 

 66 

 66 

 65 

 65 

 65 

 69 

 71 

 71 

 74 

 65 

 70 

 72 

 74 

 75 

 76 

 72 

 70 

 68 

 66 

 65 

 65 

 65 

 65 



40 

 70 

 20 

 40 

 30 

 10 

 20 

 50 

 10 

 60 

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2.2 

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2.2 

 2.2 

 2.2 



2.2 

 2.2 

 2.2 



.4 

 .4 

 .4 

 .4 

 .4 

 .1 



1.2 

 .9 

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 .5 

 .8 

 .5 

 .7 

 .9 

 .6 



1.1 

 .6 

 .6 

 .3 

 .3 

 .3 

 .2 

 .2 

 .2 



77 



