564 



OHIO EXPERIMENT STATION: BULLETIN 345 



H 



s. 



1 



X 



H 





aaqmoDaa 



aaqmaAON; 



aaqtaa^das 



aunf 



oot^cotoc^ 



oooooto 



OOOstOco 



O-rfOOtOO 



OOC40OCOCO 



o^ o^oo^o^ 



