other hand, although the owner seeks income, he has the 

 equity and his dominant interest should be to preserve his 

 equity unimpaired. It is his responsibility, therefore, to 

 select tenants who will operate in such a manner as con- 

 serves the soil. The owner must bring every influence to 

 bear to secure such management; wise selection of tenants, 

 inducements in the terms of the contract short-term and 

 share leases should be avoided information, friendly guid- 

 ance. It is obvious that also creditors holding long-term 

 mortgages have a similar responsibility. 



Tenancy, and all that makes for tenancy, is at the root 

 not only of the agricultural but of the conservation problem. 



EROSION AND PRODUCTION PER ACRE 



PARTIALLY ERODED 



BADLY ERODED 



EACH EAR REPRESENTS FIVE BUSHELS 



Figure 32. 



3. CREEKS, PONDS, RIVERS, AND LAKES 



AN ASPECT of drainage policy and practice to which only 

 passing attention has been given is their influence on ponds 

 and lakes, and on creeks and other small headwater streams. 15 

 Drainage practices have led in places to the disappearance of 

 many ponds and lakes and to the lowering of others; and 

 the desire to reduce the overflow of streams in rainy seasons 



15 See pp. 21 and 27. 



