3 & 
VEGETABLE GARDENING 
knives and shovels are made in great variety for most 
wheel hoes. The knives as shown in Figure 3 are espe- 
cially valuable for shallow tillage in sandy soils. They 
may be shortened in order to cultivate when the rows are 
only 6 inches apart, although 10 to 14 inches are usually 
allowed for wheel hoe cultivation. Figure 4 shows a 
combination wheel hoe and seed drill that is highly val- 
FIG. 4. COMBINATION HAND SEED DRILL AND CULTIVATOR 
ued, but combination hoes and drills are not generally 
popular. 
There is no rule to be followed in cultivating garden 
crops. Hard crusts should certainly not be allowed to 
remain unbroken for any great length of time. It is gen- 
erally best to cultivate as soon as the ground is dry 
enough after every rain. Frequent tillage destroys weeds 
before they have made much of a start and it also main- 
tains the best growing conditions in the soil. Crops are 
never injured by too much cultivation of the proper kind, 
