OUTLINE OF CHAPTER VII. 



ROTATION or CROPS. 



^.—INFLUENCE OF ROTATION UPON PLANT= 



FOOD. 



I. Preserves Food Supply. 



1. Prei'eiits Exhaustion. 



2. F revolts Loss by Exposure 



II. Increases Food Supply. 



1. Renders Plant-food Available. 



2. Jy rings Up Plant- food from the Subsoil. 



3. Facilitates Fertilizing. 



^.—ROTATION AS AFFECTING THE ENEMIES 



OF PLANTS. 



I. Eradicates Weeds. 



II. Exterminates Insect Pests. 



6.— PROFIT IN ROTATION. 



Z>.— SELECTING THE COURSE IN ROTATION. 

 I. What Can Be Successfully Grown ? 

 II. What Can Be Successfully Used or Sold? 



A— BETTER DISTRIBUTION OF LABOR. 



A— SUGGESTED COURSES IN ROTATION. 



6^.— TABLE OF SOILING CROPS. 



^.— CATCH, OR COVER, CROPS. 



/.—KEEPING ACCURATE ACCOUNTS. 



Exercise 9. 



/.—REFERENCES. 



151 



