14 
BULLETIN 1289, U. S. DEPARTMENT OF AGRICULTURE 
flies (Syrphus and Eristalis) ; butterflies, many species; moths, many 
species; ants, many genera and species; aphids ( MicrosipMum pisi); 
thrips, many species. 
SEED AND STRAW YIELDS OF VARIETIES 
The number of years that varieties of vetch have been grown in 
the experiments ranges from one to nine. Yields of both seed and 
straw have been obtained as given in Table 6. The spring seedings 
have given very poor yields, but the fall seedings are mostly good. 
The data are from seedings made at Corvallis, Oreg. 
Table 6. — Yields per acre of seed and straw of vetch varieties from fall and spring 
seedings 
[Computed from duplicate twentieth-acre plats. The asterisk (*) marks a year of crop failure] 
Production and variety 
Years 
of test 
1915 
1916 
1917 
1918 
1919 
1920 
1921 
1922 
1923 
Aver- 
age 
Seed, fall seeding: 
No. 02992 
9 
9 
7 
7 
6 
6 
5 
4 
4 
4 
4 
4 
4 
3 
3 
3 
2 
1 
3 
5 
1 
1 
1 
5 
5 
5 
4 
4 
4 
3 
2 
2 
2 
2 
2 
2 
2 
2 
1 
Lbs. 
780 
80 
Lbs. 
1,825 
1,490 
Lbs. 
1,080 
870 
1,530 
720 
Lbs. 
(*) 
(*) 
(*) 
(*) 
1,038 
1,116 
Lbs. 
2,380 
2,210 
2,190 
~I,"500~ 
1, 960 
Lbs. 
1,520 
1,560 
1,540 
1,040 
2,480 
2, 160 
2,400 
1,320 
2,240 
2,310 
2,700 
1,800 
2,010 
1,900 
960 
Lbs. 
1,690 
1,740 
2,020 
1,500 
2,380 
2,622 
2,280 
1,810 
2,200 
2,020 
2,560 
1,720 
2,100 
Lbs. 
740 
700 
340 
"(*)"" 
(*) 
~~~360~ 
580 
300 
330 
320 
(*) 
Lbs. 
1,840 
1,920 
2,020 
1,740 
2,240 
960 
1,800 
1,740 
2,070 
1,720 
1,800 
1,840 
1,970 
Lbs. 
1,317 
No. 18338 
1,174 
No. 02830 . 
1,377 
No. 04324 (crown) . 
No. 13430 
320 
1,050 
910 
1,606 
No. 18805 
1,470 
No. 04385 (pearl) . _ 
No. 02831 
728 
570 
1,308 
No. 13420 
1,773 
No. 1652. 
1, 588 
No. 16462 
1,848 
No. 21582 
1,420 
No. 31084 
1, 520 
No. 18134 
1,125 
1,760 
1,595 
No. 34947 
2,020 
1,920 
850 
1,633 
Macrocarpa 
No. 7708 
~~~140~ 

120 
810 
550 
725 
440 
795 
495 
No. 17021 
140 
Seed, spring seeding: 
No. 02992 
1,150" 
245 
450 
480 

220 
82 
No. 04385 
530 
494 
No. 13430 
480 
No. 17021 
140 
140 
No. 18134 
435 
3,680 
3,620 
2,020 
4,080 
435 
Straw: 
No. 02830 
4,400 
3,740 
3,660 
3,940 
3,860 
3,380 
4,620 
4,340 
3,780 
~3,~866~ 
3,700 
4,060 
5,280 
5,540 
4, 560 
4,820 
5, 260 
5,500 
6, 180 
4,020 
4,880 
6,300 
5, 900 
4,800 
6, 360 
5,940 
5,380 
5,800 
6, 460 
4,420 
4,820 
4,580 
5,420 
6,000 
5,800 
5,780 
5,600 
4,428 
No 02992 
4,556 
No. 18338 

4,292 
No. 04324 
4,250 
No. 13430 
4,325 
No. 18805 
4,230 
No. 04385 
3,420 
4,780 
No. 02831 
6, 090 
No. 13420 
4,910 
No. 16452 


5, 330 
No. 16462 
5,950 
No. 18134 
4,240 
5,070 
No. 21582 
5,280 
6,120 
5, 560 

5, 040 
No. 31084 
6, 240 
No. 34947 
5, 750 
No. 7708 
3,060 
3, 060 
RATE OF SEEDING 
The best rate for seeding a crop varies with so many factors that 
a wide range of limits must be allowed. Experiments conducted at 
Corvallis, Oreg., for a period of seven years show that the heaviest 
yields of both hay and seed have been obtained from an intermediate 
rate of seeding (fig. 5). This has been the case both when vetch 
was seeded alone and when seeded with oats (figs. 6 and 7). The 
detailed results are given in Table 7. For western Oregon and west- 
ern Washington the best rate of seeding seems to be 80 pounds of 
vetch when sown alone and 60 pounds of vetch and 40 pounds of 
