PRINCIPLES 



OF 



PLANT CULTURE 



AN ELEMENTARY TRKATISE DESIGNED AS 

 A TEXT-BOOK FOR BEGINNERS IN AG- 

 RICULTURE AND HORTICULTURE 



BY 



E. S. GOFF 



PROFESSOR OF HORTICULTURE IN THE UNIVERSITY OF WISCONSIN 



I &> Q/7 



THIRD REVISED EDITION 



UNIVERSITY CO-OPERATIVE CO. 



MADISON, WISCONSIN 



1906 



14 JlnW 1907 



