BUD VAKIATION IN THE MARSH GKAPEFEUIT. 



103 



first grade was produced by the trees of the Marsh strain, and this 

 strain also bears the best quality fruit. The low proportion of first- 

 grade fruit produced by the trees of the Rough Seedy straia was very 



%F/RST GffADE 



% SECOND GRADE 



%CULL GRADE 



/3 MARSfi STRA/A/ 

 / SMOOTH SEEDY STRA/A/ 49.3 

 S /f/G/fEST. PRODUC///e , 48.9 



(all MARSft ST/TAmJ 



/ ROUG/i STRA/A/ 



5 LOWEST PR0DUC/AJ6 



4 ROUGH SEEDY STRA/N 



P20929HP 



Fig. 5. — Average annual proportions of fruit of the different commercial grades in the crops of the trees 

 of the various strains of Marsh grapefruit occurring in the investigational performance-record plat A in 

 a grove planted in 1898. The percentages are based on the average weights of the crops for the 6-year 

 period, 1910 to 1915, inclusive, except that the data regarding culls cover only the 4-year period, 1912 to 

 1915, inclusive. 



noticeable. Figure 6 shows that in plat B there was practically no 

 difference between the trees of the different strains ia their propor- 

 tions of fruit of the different grades. 



%E/RST G/fADE 



% SECOND GRADE %CUU GRADE 



5 LOWEST PRODUC/A/G 

 3 UAJP/iODUCT/i/E STRA/A/ 

 40 N/ARS// STRA/A/ 

 9 ALTERA/ATE-BEAR/A/G STRA/A/ 

 S /i/GHEST, PRODUC/A/G , 



(all MADSn stkainJ 



P20928HP 



Fig. 6. — Average annual proportions of fruit of the different commercial grades in the crops of the trees 

 of the various strains of Marsh grapefruit occurring in the investigational performance-record plat B in 

 a grove planted in the fall of 1903. The percentages are based on the average weights of the crops for 

 the 6-year period, 1910 to 1915, inclusive, except that the data relating to culls cover only the 4-year 

 period, 1912 to 1915, inclusive. 



Table V. — Average total annual crop per tree of the different strains of Marsh grape- 

 fruit in investigational plats A and B, showing production by grades of fruit for the 

 6-year period, 1910 to 1915, inclusive. 





Num- 

 ber of 

 trees. 



Average annual production. 



Description of trees. 



Total crop. 



First grade. 



Second grade. 



Cull grade.i 





Weight. 



Num- 

 ber. 



Weight. 



Num- 

 ber. 



Weight. 



Num- 

 ber. 



Weight. 



Num- 

 ber. 



Investigational plat A: 



Highest producing (all 



5 

 1 



19 

 4 

 5 

 1 



5 

 40 

 9 

 5 

 3 



Us. 

 441.8 

 404.5 

 381.2 

 223.2 

 223.0 

 222. 4 



218. 2 

 161.6 

 151.5 

 99.9 

 89.7 



565 

 531 

 474 

 265 

 261 

 248 



263 

 195 

 191 

 119 

 106 



Lhs. 

 216.1 

 184.2 

 203.9 

 56.2 

 66.9 

 109.7 



140.3 



106.7 



99.7 



67.3 



59.6 



251 

 225 

 225 

 64 

 73 

 111 



' 158 



120 



116 



75 



65 



Lhs. 

 206.3 

 204.1 

 158.5 

 141.5 

 132.2 

 95.0 



69.7 

 49.5 

 46.4 

 28.8 

 26.8 



268 

 269 

 203 

 156 

 146 

 105 



86 

 62 

 61 

 35 

 32 



Lhs. 

 29.1 

 24.3 

 28.2 

 38.2 

 35.9 

 26.6 



12.3 

 8.0 

 8.0 

 5.6 

 5.0 



70 



Rough strain 



55 





70 



Rough Seedy strain 



Lowest producing 



Smooth Seedy strain 



Investigational plat B: 



Highest producing (all 

 Marsh straia). 



68 

 64 



48 



28 



Marsh strain 



20 



Alternate-Bearing strain. . 



Lowest producing 



Unproductive strain 



20 

 14 

 13 



I These data relating to cull fruits cover only four years, 1912 to 1915, inclusive. 



