316 CAMPBELL'S SOIL CULTURE MANUAL 



for profit nor as a side line for speculative purposes, and 

 they are kept free from the influences that might tend to 

 exaggerate the results for selfish reasons. The persons who 

 take the correspondence course will be the greatest gainers 

 from this educational and demonstrative work. 



Since the first edition of this book was printed there has 

 also been started, in response to an almost universal de- 

 mand, a monthly magazine called Campbell's Scientific 

 Farmer, which is devoted wholly to the teaching of the 

 principles of scientific soil culture. This is not a general 

 farm paper nor a household paper, but a special journal 

 devoted to one line of farming or one branch of agriculture, 

 just as a stock breeder's journal or a horticultural magazine 

 or a publication devoted to forestry or irrigation. This 

 Campbell's Scientific Farmer will therefore supplement the 

 great work in which we have been engaged many years, 

 by carrying direct to the people current information as 

 to what is done and is being done in the various portions of 

 the country with regard to soil culture methods best adapted 

 to the dry country or to dry conditions. 



Everywhere it is coming to be recognized that agricul- 

 ture is a great science and that it is one of the things about 

 which there is always much to learn. The movement back 

 to the farms is genuine, and it has a reason. But if there 

 is to be a movement back to the farms it should be intelli- 

 gently directed. More than that, the movement should 

 have a solid foundation. In the semi-arid portions of the 

 countries lie the greatest possibilities. Those who make 

 themselves perfectly familiar with every question which 

 may arise in regard to the semi-arid region are those who 

 will achieve greatest success. 



