CULTIVATION IN DRY AREAS 145 



overleachy. It is harmful in its tendencies, since in 

 time of Heavy rainfall the loss from "run off" water 

 would be increased. From what has been said it will 

 also be apparent that while there is an important place 

 for subsoil packing on certain soils, the claim sometimes 

 made that the packer should in all instances follow the 

 plow cannot be defended. 



The packers most commonly in use are not of very 

 much value. They are too diminutive for effective work, 

 and the wheels are of cast iron, which clog in damp soil 

 and which wear quickly. Among the best are the Dun- 

 ham soil packers and pulverizers combined. The Dun- 

 ham rigid frame packer and pulverizer is 8 feet long 



THREE SECTION DUNHAM PACKER AND PULVERIZER. 

 15 Feet Long. * 



Courtesy Deere & Webber Co., Minneapolis, Minn. 



and has 12 sections. The Dunham flexible packer and 

 pulverizer is of two sizes, viz., 10 and 12 feet long, with 

 14 and 18 sections respectively. A third Dunham packer 

 and pulverizer is 15 feet long and has three divisions. 

 The two last mentioned implements can adjust them- 

 selves to uneven land. 



The disc and its use. The disc, though commonly 

 classed as a' harrow in common with certain other im- 

 plements, will not be so considered in the present dis- 

 cussion. The same may also be said of the cutaway 

 harrow, the spring tooth harrow and the alfalfa har- 



