RESULTS OF EXPERIMENTS. 
‘ 
81 
Taste IV.—Results on the health of trees of varying the depth of the union in planting 
root grafts, second experiment. 
Year. 
Number.| Galled. 
Per cent. 
1, 288 21.3 
2, 450 6.6 
1,079 mt 
4,817 9.4 
Trees with long scions. 
Hairy. 
Per cent. 
7.6 
10.6 
8.6 
7.5 
Trees with short scions. 
Number. 
1,446 
2, 960 
1,182 
| 5, 588 
Galled. 
20.9 
5.3 
1.6 
8.6 
Per cent. 
Hairy. 
Per cent. 
TaBLeE V.—Results on the health of trees of selecting upper and lower piece roots for root 
Year. 
grafts. 
Trees from grafts on upper 
piece root. 
anes Galled. | Hairy. 
Per cent. | Per cent. 
743 19.8 Cod, 
1, 675 6.0 itt yl 
580 1.9 10.9 
2, 998 8.6 1209 
Trees from grafts on lower 
Number 
dug. 
703 
1, 285 
602 
2, 590 
piece root 
Galled. 
Per cent. 
22.0 
4.5 
ea 
8.5 
Hairy.” 
Per cent. 
7.4 
10.6 
tao 
9.0 
TaBLE VI.—Results on the health of trees of using seedlings diseased with hairy-root in 
root grafting, first series of experiments. 
Year. 
Trees with hairy-root grafts. 
Number. | Galled. 
Per cent. 
1,132 eS 
1,922 4.8 
922 7.4 
3,976 Uls83 
Hairy. 
Per cent. 
73.8 
79.2 
Trees with smooth-root grafts. 
Number. 
751 
1,481 
632 
2, 864 
Galled. 
Per cent. 
4. 
8.7 
Uoll 
12.6 
Hairy. 
Per cent. 
7.9 
11.0 
10.9 
10.2 
TaBLE VII.—Results on the health of trees of using seedlings diseased with hairy-root in 
making root grafts, second series of experiments. 
Year. 
00414°—Bul. 186—10——6 
Trees with hairy-root grafts. 
Number. | Galled. 
Per cent. 
141 1.4 
268 Dee, 
81 6.2 
490 2.6 
Hairy. 
Per cent. 
Trees with smooth-root grafts. 
Number. 
125 
245 
99 
469 
Galled. 
Per cent. 
Hairy. 
Per cent. 
5.6 
10.6 
9.1 
8.9 
