40 



BULLETIN 1082, U. S. DEPARTMENT OF AGRICULTURE. 



ard throughout the planting, a record of performance of bulbs in i1 

 is a record of the variety. The unit of measurement in Table 5 ir 

 each entry is the row whose length is the width of the bulb bed, or S 

 feet, planted, but owing to the growth extending over into the paths 

 the row may be considered 39 inches, and therefore comparable witi 

 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 strictlj 

 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 



S 



7 



6 



5 



4 



3 





8 

 as 

 7 

 7 

 5 

 5 

 7 

 8 

 8 

 68 

 7 

 7 

 7 

 5 







5 



8 

 8 

 8 



7 



U 

 14 

 21 

 21 

 35 

 35 

 21 

 14 

 14 

 14 

 21 

 21 

 21 

 35 

 35 

 35 

 14 

 14 

 14 

 21 



2 



2 



"I' 



7 

 6 

 7 

 5 



3 

 6 

 5 



8 

 6 

 9 

 5 



8 



"i 

 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 



"s' 



13 

 7 

 14 

 13 



8 

 4 



10 

 4 

 7 

 8 



16 



12 

 3 

 7 

 5 



10 

 3 



10 

 7 

 5 

 1 



10 

 6 

 8 



"Y 

 5 

 4 

 6 



'is' 



7 



7 





7 



Do 







f, 



Do 











Do 









q 



Do .... 











TJ 











9 

 2 

 7 

 6 

 6 

 6 

 6 



8 



Do 







2 

 6 

 5 





11 



















5 

 3 



6 

 9 

 5 

 4 

 15 

 1 

 5 

 8 



5 

 .... 



1 

 17 

 16 

 10 



6 

 5 



8 

 4 



"9' 



7 



9 



"Y 

 7 

 10 



6 



4 



Do 



11 



Do 











Do 









s 



Do . ... 









q 



Do 















Do 













"i 



Chrysolora 









10 



4 

 4 

 11 







Clara Butt 







10 

 8 

 4 



5 

 14 

 11 



"5' 



12 

 6 

 12 



•i 



Do 





1 



1 

 4 



"2 





Do 





a An average in round numbers of 5 readings. *> An average in round numbers of 10 readings. 



