xvi TABLE OF CONTENTS 



Page 



3. THE DEPTH TO PLOW 128 



(a) When plowing should be deep. 



(b) When plowing should be shallow. 



(c) When to vary the depth in plowing. 



4. THE KIND OF PLOW TO USE 131 



(a) The mold-board plow and its place. 



(b) The disc plow and its place. 



(c) The deep tilling machine and its place. 



5. POWER TO USE IN PLOWING 134 



(a) The place for farm animals in plowing. 



(b) The place for steam power in plowing. 



(c) The place for gasoline power in plowing. 



6. GOOD PLOWING IN DRY AREAS 136 



(a) The importance of good plowing. 



(b) The essentials of good plowing. 



(c) The care of the plow. 



7. SUBSOIL PLOWING IN DRY AREAS 137 



(a) What is meant by subsoil plowing. 



(b) The benefits from subsoil plowing. 



(c) When subsoiling should be practised. 



8. THE FREQUENCY OF THE PLOWING 139 



(a) When farming land just broken. 



(b) When plowing summer-fallow. 



(c) When to disc rather than plow. 



CHAPTER VIII 

 CULTIVATION IN DRY AREAS 



1. THE SUBSOIL PACKER AND ITS USE 143 



(a) The subsoil packer described. 



(b) When and how it should be used. 



(c) When and where it should not be used. 



2. THE Disc AND ITS USE 145 



(a) The disc described. 



(b) When and how it should be used. 



(c) When and where it should not be used. 



3. CULTIVATORS OTHER THAN THE Disc 149 



(a) Cultivators suitable for dry areas described. 



(b) When and how they should be used. 



(c) When and where they should not be used. 



4. HARROWS AND THEIR USES 154 



(a) Harrows suitable far dry areas described. 



(b) When and how they should be used. 



(c) When and where they should not be used. 



5. ROLLERS AND THEIR USES 158 



(a) Rollers suitable for dry areas described. 



(b) When and how they should be used. 



(c) When and where they should not be used. 



