150 DRY LAND FARMING 



surface cultivator, and the spike tooth cultivator. 

 There is also a garden cultivator, of which that known 

 as the Planet Jr. is one of the best* 



The spring tooth cultivators are of several types. 

 Prominent among these are the Old Reliable, with wood 

 frames, and the Minnesota Chief (see p.. 149.) The 

 latter has a steel frame and it is of such construction 

 that it acts also as a runner, that is, it has runners on 

 the two sides which tend to lighten the draft. The 

 depth to which the teeth cut can be adjusted. When 

 they meet an impediment in the soil, as the name implies, 

 they are so flexible that they spring over it without 

 breaking. 



The clod crusher is virtually an improvement on 

 the Acme harrow, which has been used so effectively 

 on wide areas in the humid country, and which 

 may also do effective work under dry conditions in 

 certain areas. The knives of this very useful imple- 

 ment are curved and the slant given them is adjustable. 

 They cut into the soil for some distance and fine it by 

 crushing the lumps. They slice off ridges and hum- 

 mocks, and destroy weeds unless they are strongly rooted. 

 The rake teeth at the rear still further fine, smooth and 

 level the ground. The rear gauge wheels make it pos- 

 sible to regulate the cutting depth of the knives. It 

 does most effective work while the clods are not yet 

 hard and dry. 



The Climax cultivator is a wheel cultivator with two 

 or three sets of V-shaped teeth or shares of different 

 widths. These are attached to iron or steel bars which 

 project downward from a strong frame. The shares cut 

 below the surface of the ground and are adjustable as to 

 the depth of the cutting. The different widths are in- 

 tended to make it possible to cut over the whole surface 

 or a part of it or to dig into the soil rather than cut 

 through it. This implement, considerably used in some 



