8o FUNDAMENTALS OF AGRICULTURE. 



7. It furnishes a more regular income during the 

 year. In single crop farming sales come but once, 

 hence single crop farmers often do business on credit 

 during the greater part of the year. 



8. It furnishes a variety of forage which is essential 

 to live-stock farming. 



9. It lessens the danger from insect pests and plant 

 diseases. 



FIELD OF GRASS SUCCEEDING WHEAT WHICH FOLLOWED TOBACCO. 



Principles to be Observed in Planning a Rotation of 

 Crops. Each farmer should select the rotation for 

 his own farm from the great number of combinations 

 of crops that may be grown. It is impossible to say 

 what the best rotation may be for any particular farm 

 without a careful study of the soil, climatic conditions, 

 insect pests, plant diseases and market demands of the 

 section where the farm is located. The following 

 principles may aid in planning a cropping system, but 

 success in farming can never be attained by following 

 a series of set rules. 



The crops grown in a rotation should all be adapted 



