TIME OF PLOWING SMALL-GRAIN STUBBLE. 15 



than compensates for the loss by weed growth of the precipitation of 

 August and September, when such precipitation is light. 



(3) Late fall plowing does not prevent the loss of early fall precipi- 

 tation through weed growth, but it does destroy stubble, which would 

 aid in holding winter precipitation. 



(4) If heavy rains occur in August or September, plowing should 

 be done immediately after they cease. If this can not be done, or if 

 heavy rams do not occur, the land should be left in stubble until the 

 following spring. 



(5) The ideal cultivation would prevent weed growth in the fall, 

 leave the land in condition to retain the maximum quantity of snow 

 in the winter, and thoroughly destroy small weeds immediately before 

 seeding. Possibly this may be accomplished by disking in the fall 

 and plowing in the spring, or listing in the fall and bursting the ridges 

 in the spring may prove practicable. 



(6) In deciding when a field in this part of eastern Colorado should 

 be plowed, the question whether a greater amount of water will be 

 accumulated from snow than will be dissipated by weeds is para- 

 mount and must be decided by the man on the ground. 



OVBRNMRNT PRINTING OFFICE: 1D15 



