202 COBN CROPS 



the soil is in poor physical condition and needs pulver- 

 izing. 



Two-rowed cultivators adapted for use with either two 

 or three horses are now in general use. If two-row cul- 

 tivators are to be used, the rows should be straight and 

 uniformly equal distances apart. With the two-row 

 cultivator it is not possible to do as careful work close to 



Fir:. 60. — Lat!> rultivation of corn, with narrow tooth plow. 



the row as when a single row is worked at a time. On 

 the other hand, when the corn is clean in the row it may 

 do all that is necessary in half the time. 



One horse cultivators are not used much in corn cultiva- 

 tion, except occasionally for late cultivation where the 

 plants are too high to straddle. 



For listed corn a variet}^ of tools has been specially 

 devised. A spike tooth harrow is often used to level the 

 ridges slightlj^ when the corn first comes up. Then a 

 tool such as illustrated in Fig. 70 is sometimes used or, 

 more commonly, a two-row tool of the tj-pe illustrated in 

 Fig 71. The first time over, the disk followers are usually 



