276 



CROP ROTATION 



B 1. Corn (in which some green-manuring crop may be sown). 



2. Oats (if prairie soil, oats disked in on corn land; seeded). 3. 

 Clover plowed in fall and sown to winter wheat. 4. Winter 

 wheat (Fig. 172) (seeded with mammoth clover to plow under, 

 or if soil has "tight" or heavy clay subsoil, sweet clover is better). 



C 1. Corn for grain or silage. 2. Soybeans for hay or seed. 

 (If soil needs organic matter this crop may be plowed under.) 3. 

 Oats (Fig. 173) or barley (seeded to clover). 4. Clover. 5. Winter 

 wheat (seeded to mammoth clover for green-manuring) . 



This rotation (C) is especially well adapted for loams 

 and sandy loams. 



D 1. Corn. 2. Oats (seeded to mammoth clover to plow 

 under), winter wheat sown in the fall or spring wheat in the spring. 



3. Wheat (seeded to clover or clover and mixed grasses) . 4. Clover 

 (often followed by pasture the fifth year) . 



EACH DOT 

 9tPHESNT 

 10000 ACRES 



FIQ. 172. Winter wheat acreage. 



Fio. 173. Spring oats acreage. 



This rotation (D) proves very successful when soybeans, 

 instead of oats, are grown the second year, as: 1. Corn . 2. Soy- 

 beans. 3. Wheat (seeded to clover). 4. Clover. 



E 1. Corn. 2. Flax. 3. Wheat. 4. Clover. 5. Pasture. 



F 1. Alfalfa (five to eight years). 2. Potatoes. 3. Flax. 

 4. Corn. 5. Wheat. 



G 1. Alfalfa (three to four years). 2. Corn. 3. Grain. 

 4. Clover. 



H 1. Clover. 2. Potatoes or corn. 3. Rye (seeded to mam- 

 moth clover). 



I 1. Rye (seeded to mammoth clover). 2. Clover. 3. Corn 

 (rye in corn for green-manuring). 4. Soybeans (rye sown in fall). 



Rotations (H) and (I) are especially good in sand management. 



J 1. Barley (seeded to clover). 2. Field peas. 3. Winter 

 wheat. 4. Clover. 5. Corn. 



K 1. Tobacco (Fig. 174). 2. Tobacco. 3. Winter wheat 

 or barley. 4. Clover. Corn may be grown the second year, or 

 follow the second tobacco crop. 



