CAMPBELL'S SOIL CULTURE MANUAL 



CHAPTER II. 



HOW TO USE THE MANUAL. 



Complete mastery of the principles governing scien- 

 tific soil culture is essential to success in practical field 

 work. 



These are the steps likely to be followed by one who 

 will achieve highest success: Honest inquiry into the 

 merits of the system, study of the question with mind 

 divested of all prejudice, courage to apply the principles 

 regardless of the influence of wrong outside teaching or 

 influences, study over and over again of all that is here 

 laid down in regard to handling the soil, intelligent ap- 

 plication to conditions as they may be found affected 

 by local influences. 



One who takes up this Manual deeply or even slightly 

 prejudiced against all things new and disposed to scoff 

 at or criticise all teaching that does not have the recom- 

 mendation of age, will make no headway. Honest doubts 

 will not stand in the way, if the mind is free to accept 

 the truth no matter who reveals it. But 'at a time when 

 the most eminent students of agriculture throughout the 

 world are admitting that their views are undergoing 

 rapid changes, and when there is everywhere a passion 

 for new things, new plants, new machinery, new methods 

 no man should be found disputing the conclusions of 

 practical experience. 



Then there must be not only courage to go right out 

 into the fields and do the things which must be done for 



