492 FIELD CROPS 



show how it may be improved to more nearly meet the four essentials 

 of a good rotation. If no rotation is followed, plan one which is suit- 

 able for the type of farming which is followed. 



2. Plan a 3-year rotation, using the more important crops of 

 your community and taking care that the four essentials are included. 

 In the same way, plan 4-year and 5-year rotations. 



3. Plan a rotation which will be suitable for a dairy farm in your 

 section; for a hog and beef-cattle farm; for the production of the lead- 

 ing cash crop. 



REFERENCES 



Cyclopedia of American Agriculture, Vol II, Bailey. 



Field Management and Crop Rotation, Parker. 



Farm Crops, Burkett. 



Farm Development, Hay. 



Soil Fertility and Permanent Agriculture, Hopkins. 



Field Crop Production, Livingston. 



Productive Farm Crops, Montgomery. 



