Preface 



'HE treatment of any farmer's 

 soil is entirely within his hands. 

 Success is measured by his 

 knowledge and the diligence with which 

 he applies those laws of Nature which are 

 related to crop growing. 



These laws are universal. A farmer 

 can apply them to meet his own partic- 

 ular need better than acting upon the ad- 

 vice anyone can give him, because he 

 understands his soil conditions. Other 

 people do not. 



The purpose of this book is to set 

 forth these laws and explain the causes 

 and effects. 



The Oliver Chilled Plow Works has a 

 desire to be of practical value to farmers. 

 Our long experience in building plows and 

 kindred implements for use all over the 

 world has given us an opportunity to ob- 

 serve a great many facts in connection 

 with plows and plowing which should be 

 common knowledge among farmers. 



OLIVER CHILLED PLOW WORKS. 

 469802 



