Bui. 238, U. S. Dept. of Agriculture. 
Plate II. 
Fig. 1.— A Shallow-Plowed Beet Field. 
Fig. 2.— A Deep-Plowed Beet Field. 
CONTIGUOUS SHALLOW-PLOWED AND DEEP-PLOWED FIELDS, SHOW- 
ING THE EFFECT OF EACH METHOD ON WEEDS. 
Shallow plowing leaves the weed seeds near the surface, where they spring up before the beet 
seeds, checking and choking the young beet seedlings. Deep plowing buries the weed seeds 
and gives the beets an opportunity to get started before they come up. 
