120 DRY FARMING 



drills, the "shoe" drill, the "hoe" drill, the "single disc" 

 and the "double disc". (Fig. 43). 



The shoe drill (Fig. 43B) can hardly be called a till- 

 age implement. The hoe drill (Fig. 43 A) is to a slight 

 degree a cultivator of the narrow tooth type. The single 

 disc drill (Fig. 43C) is not only a drill but a disc harrow 

 as well, of rather low efficiency, while the double disc is a 

 drill only. (Fig. 43D). 



Where some cultivation is needed, such as on some un- 

 plowed stubble fields, the single disc is perhaps best. On 

 soils that are well prepared and not too hard and where 

 drifting is feared the old hoe or the shoe drill are quite 

 satisfactory, particularly on light soils. Where soils are 

 well prepared, yet quite firm, the double disc is probably 

 the best to use. 



The shoe and hoe drills pull easier and generally re- 

 quire less repairs than the discs but on all except light 

 soil or well prepared land they are not at present as 

 popular as the discs. 



90. Press Drills. — The press attachment is a packer and 

 perhaps the most efficient one from the point of view of 

 the seed. It packs the ground where it needs packing at 

 the time it needs it, and leaves unpacked the portion 

 that is best left loose. But the press drill as at present 

 constructed is costly, heavy to pull, somewhat dif- 

 ficult to operate, particularly in sticky soil, and is likely, 

 as a rule, to require more repairs than most other types 

 of drill. It is coming into quite general use on soils that 

 drift and is often found on medium type soils in the dry 

 belt. (Fig. 43B). 



