TILLAGE, 73 
States of gravelly or loamy soils, where the 
yield is rarely high but is rather certain, and 
where corn follows clover, it is the custom 
with many excellent farmers in planting on 
such sod to plow shallow, not more than three, 
three and one-half or four inches deep, but in 
the after-cultivation to plow the corn in sum- 
iner very deep.” On heavy, cold sod land, 
plowing a depth of five to six inches will no 
doubt be more satisfactory than at a greater 
one. On light, easily broken soil, the plow 
may run deeper to advantage. Under circum- 
stances where drouth may occur. somewhat 
better results may be looked for from the deep 
plowing. 
Harrowing. — Having the land _ properly 
plowed, it should be reduced to a fine tilth by 
the use of the harrow. On sod land a disk or 
cutaway harrow can be most efficiently used to 
tear and pulverize the overturned turf. This 
may be followed by a smoothing harrow that 
will prepare a smooth, fine seed bed. If lumps 
or ¢lods occur that do not easily break under 
the harrow they should be broken either with 
a roller or plank drag. Three oak planks, each 
about six feet long, ten inches wide and two 
inches thick, chained on lap edges like weather 
boarding, and drawn broadside over the field, 
will rapidly crush obnoxious clods, 
Cultivating—Even before the corn plant 
