BUD VARIATION IN THE LISBON LEMON. 55 
Table VIII shows the average monthly production of fruit of 
the Green and Tree-Ripe grades by the trees of the various strains 
and also presents these same data in terms of monthly percentages 
of the average annual production of each grade. In this latter 
form the data for the various strains are directly comparable, 
showing the variations between the strains in season of bearing. 
These variations are more clearly presented in figures 6 and 7. In 
figure 6 the monthly percentages of production are grouped by strains. 
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Fic. 7.—Diagram showing the percentage of the total yield of fruit of Lisbon lemons ofthe Green and Tree- 
Ripe grades, by weight, which was produced each month by the trees of the various strains in the in- 
vestigational performance-record plat during the 3-year period from July, 1914, to June, 1917, inclusive. 
These are the same data that are presented in figure 6, being here rearranged to show more clearly the 
variations between the different strainseach month. Thestrains are listed from left toright in the same 
order as in figure 6. Arrangement of strains: 1,10 highest producing trees; 2, 22 trees of the Lisbon 
strain; 3, 11 trees of the Bullstrain; 4,3 trees of the Sporting strain; 4, 121 trees—entire plat; 6, 77 trees 
of the Open strain; 7, 10 lowest producing trees; 8, 8 trees of the Dense-Unproductive strain. 
The trees of the Lisbon strain are shown to have borne most heavily 
of fruit of the Green grade in January, February, March, and April, 
being at their maximum in March, although Table V shows that 
the interval between the February and March pickings in 1915 was 
only 21 days and Table [X shows that the picking ring was increased 
in size in March, 1916. The trees of the Bull strain produced the 
largest crops of the Green grade in December, January, February, 
and March, being at their maximum in January, a condition partly 
due to the fact that, as shown in Table IX, the size of the picking 
ring was reduced in that month in two of the three years, although it 
was increased in size in that month in the third year. The trees of 
the Open strain bore most heavily of fruit of the Green grade in 
February, March, April, and May, being heaviest in March, like the 
