AFTER PLOWING, HARROWING 



151 



Just what to do to complete the preparation of the seed bed 

 depends largely upon how clearly the farmer understands what 

 constitutes a good seed bed, or good tilth. 



FiQ. 89.— The full disk harrow. 



Fig. 90.— a double disk harrow. Cutaway disk in rear. T, truck or forecarriage. 



After Plowing, Harrowing.— The implements commonly used 

 after the plow are the disk and smoothing harrows (Figs. 89, 90, 

 91 and 92). No other tillage tool can pulverize the soil so thor- 

 oughly and quickly as the disk harrows. Of these, the full disk is in 

 most general use. When the ground is very hard, stony, or when 

 it is tough sod, the cutaway disk is especially good. The spading 



