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TREATMENT 



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TREATMENT 



Figure 1. Yields of flowers and vege- 

 tables tested in field plots. Upper left, 

 zinnias; upper right, beans; middle 

 left, potato tubers; middle right, 

 squash; lower right, bachelor buttons. 



3Cp00 



O 20,000 

 O 



_i 

 m 



^ 10,000 



CD ' 



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 o 

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TREATMENT 



15 



