Bul. 974, U. S. Dept. of Agriculture. PLATE XXIV. 
FIG. |.—BLUEBERRY CULTIVATION WITH A DISK HARROW. 
Character of the work done with a disk harrow. This tool is especially adapted for use when 
grasses or other turi-fiorming weeds have invaded the plantation and the ground must be 
loosened deeply and thoroughly. 
Fig. 2.—BLUEBERRY CULTIVATION WITH A SPRING-TOOTH HARROW. 
The mellowing and good aeration accomplished in the white, sandy soil with the sprins-tooth 
harrow is well shown in this figure. Shallow cultivation is at most times desirable in blue- = 
berry plantations, for the roots of the plants tend to make their principal development within 
afoot ofthe surface. The plants here shown are at +ioot intervals in rows 8 feet apart. 
