COMMON VETCH AND ITS VARIETIES 
17 
TIME OF SEEDING 
The results obtained at Corvallis, Oreg., by seeding at different 
times of the year are given in Table 8. It will be noted that good 
yields are obtained from all seedings except those of late spring. The 
seasonal weather conditions in western Oregon are such that the time 
of seeding necessarily varies, but early fall seeding is to be advised 
whenever possible. In California early fall seeding both for green 
manure and hay will give the best results. Common vetch requires 
a cool growing season. It is a winter crop in all regions with a mild 
climate, and the time of seeding should be such as to obtain the best 
advantage of the precipitation and moderate temperatures. 
Table 8. — Yields per acre of seed and hay of Oregon vetch as affected by time of 
seeding 
[Computed from duplicate twentieth-acre plats. The asterisk (*) marks a year of crop failure] 
Troduct and time of seeding I 1914-15 
Seed: 
October..- 
November 
February-March. 
April 
Hay (air-dry basis) : 
October 
November 
Februarv- March. 
April 
Pounds 
1.153 
(*) 
H 
i915-16 
1916-17 
1917-18 
1918-19 
Total 
Pounds 
1,210 
Pounds 
Pounds 
Pounds 
Pounds 
1,210 
3.377 
4.753 
1,710 
9,440 
20.250 
11, 190 
6,320 
720 
1,630 
2.040 
220 
1,027 
1.560 
1,490 
5.660 
(*) 
3,780 
3,260 
4.920 
5.130 
7.080 
6.060 
700 
4.990 
5.620 
(*) 
Average 
Pounds 
1,210 
1.125 
1,584 
427 
4.720 
5.062 
5. 595 
1,580 
METHOD OF SEEDING 
The question is often asked whether drilling is better than broad- 
casting. The two methods were compared in experiments at Cor- 
vallis, Oreg., covering a period of three years. The results are given 
in Table 9. These data indicate that drilling is somewhat more 
advantageous, but it is questionable whether the experiment covered 
a period of years long enough to be conclusive. It has been sug- 
gested that drilling results in less winterkilling than broadcasting, 
but this question has never been determined. If winterkilling is a 
factor in the relative value of the two methods, different results 
would likely be obtained in regions where the winter weather is 
milder than at Corvallis. 
Table 9. — Yields per acre of Oregon vetch sown broadcast or drilled 
[Computed from duplicate twentieth-acre plats: hay yields computed on a dry-matter 
Year harvested 
Planting 
date 
Stand 
■ 
Sown broadcast 
Drilled 
Seed 
Straw i 11 a y 
Seed 
Straw 
Hay 
1915 
Oct. 14 
Nov. 3 
Nov. 10 
Per cent 
90 
190 
95 
Pounds 
1.313 
1.540 
Pounds 
Pounds 
5.980 
Pounds 
1,493 
1. 730 
1,025 
Pounds 
Pounds 
5.740 
1916 
6, 460 
1917, 
739 3. 910 1 5. ISO 
4. L80 
5, 240 
Total 
3, 592 3. 940 
16, 840 
5, '313 
4,248 
1,416 
4. 180 
4.180 
17.440 
Average 
1.197 
3.940 
5,813 
The drilled pjat had 130 per cent stand. 
