40 
BULLETIN 1082, U. S. DEPARTMENT OF AGRICULTURE. 
ard throughout the planting, a record of performance of bulbs in it 
is a record of the variety. The unit of measurement in Table 5 in 
each entry is the row whose length is the width of the bulb bed, or 3 
feet, planted, but owing to the growth extending over into the paths 
the row may be considered 39 inches, and therefore comparable with 
the foreign beds, which are 1 meter wide. 
To arrive at the propagation from the table, a calculation is 
necessary. The number of bulbs planted must be subtracted from 
the largest sizes specified in the yield columns; the remaining bulbs 
represent the " propagation " in sizes. In practice, this is strictly 
true, but from the standpoint of absolute accuracy in some cases 
there may be a slight error, for the reason that some of the increase 
may have grown to larger size than the bulbs planted. 
The record is from plantings made in the autumn of 1919. The 
stocks planted were uniformly good. 
Table 5 is largely self-explanatory. After the name of the variety 
is a column giving the size of the bulbs planted. The next column 
shows the number of bulbs planted to the row. Then follows a 
series of 12 vertical columns headed by figures showing in centimeters 
the circumference of the bulbs produced. In the horizontal spaces 
opposite each variety are shown the number of bulbs of each size 
dug from the unit row in July, 1920. The readings and calibrations 
were made in the field at digging time in July. 
The stocks for which readings are given have been grown in the 
plats of the Bureau of Plant Industry continuously for the past 10 
years or more, except Gretchen, which was imported in 1917. 
Table 5. — Propagation of tulip bulbs by rows in the Puget Sound region in 1920. 
Bulbs 
planted. 
Number of bulbs dug of each size (centimeters). 
Name of variety. 
Size 
(cen- 
time- 
ters). 
Num- 
ber to 
row. 
14 
13 
12 
11 
10 
9 
8 
7 
6 
5 
i 
3 
8 
aS 
7 
7 
5 
5 
7 
8 
8 
&8 
7 
7 
7 
5 
5 
5 
8 
8 
8 
7 
14 
14 
21 
21 
35 
35 
21 
14 
14 
14 
21 
21 
21 
35 
35 
35 
14 
14 
14 
21 
2 
2 
"V 
7 
6 
7 
5 
3 
6 
5 
8 
6 
9 
5 
8 
4" 
5 
8 
7 
"4" 
15 
5 
9 
9 
6 
11 
1 
3 
8 
5 
6 
26 
15 
17 
3 
13 
5 
"2 
5 
20 
8 
6 
6 
7 
12 
1 
4 
6 
"8* 
13 
7 
14 
13 
S 
4 
10 
4 
7 
8 
16 
12 
3 
7 
5 
10 
3 
10 
7 
5 
1 
10 
6 
8 
5 
4 
6 
"is" 
7 
_ 
7 
Do 
6 
Do . 
Do 
g 
Do 
12 
9 
2 
7 
6 
6 
6 
6 
g 
Do 
2 
6 
5 
11 
1 
4 
5 
3 
6 
9 
5 
4 
15 
1 
5 
8 
5 
.... 
1 
17 
16 
10 
6 
5 
8 
4 
"T 
7 
9 
•7 
7 
10 
6 
9 
Do 
11 
Do 
Do 
3 
Do 
9 
Do 
Do... 
5 
10 
4 
4 
11 
Clara Butt . 
10 
8 
4 
5 
14 
11 
"B 
12 
6 
12 
5 
Do 
1 
1 
4 
~2 
Do 
a An average in round numbers of 5 readings. t> An average in round numbers of 10 readings. 
