GROWING SUGAR BEETS IN CALIFORNIA. 19 
THE CYCLONE HARROW. 
The cyclone harrow was found on five farms in the Los Angeles 
area and on four at Oxnard. This implement consists of a heavy 
Fic. 9.—Typical crew harrowing with a spike-tooth. 
plank armed with steel knives which extend to the rear and down- 
ward. These knives are bent toward the center of the implement 
Fic. 10.—Spike-tooth harrowing with a crew of one man and six horses. Two horses 
are hitched directly to the harrow, while four horses are worked abreast in front 
of them. 
from either side, and they run just below the surface and cut off 
weeds. This implement pulverizes the soil quite effectively and cre- 
ates a dust mulch on the surface. 
