232 



Journal of Agricultural Research 



Vol. XVII. No. s 



Table IV. — Rate and percentage of germination of camphor seed in the experiments of 



IQIJ-18 



Parent 

 tree. 



A. 

 B 

 C. 

 D 

 E. 

 G 

 H 

 K 

 O 

 P, 



No. of row. 



, /North half.. 



ISouth half. . 



/North half . 

 nSouth half. . 



/North half . 

 nSouthhalf.. 



/North half 

 "^l South half.. 



/North half., 

 nsouthhalf.. 

 jNorthhaU.. 

 *! South half.. 



/North half. 

 nSouthhalf.. 

 JNorth half . 

 '^l South half.. 



/North half . 

 5'1 South half. . 

 JNorth half . 

 '°\ South half.. 



Treatment of 

 seeds planted. 





None 



Pulp removed... 

 Pulp removed... 



None 



None 



Pulp removed . . . 

 Pulp removed... 



None 



None 



Pulp removed... 

 Pulp removed... 



None 



None 



Pulp removed... 

 Pulp removed . . . 



None 



None 



Pulp removed... 

 Pulp removed... 

 None 



Rapidity and percentage of germination. 



191a 



Feb. II. Feb. 23. Mar. 18. Apr. 37- July 6. Dec. 30, 



No. 



16.0 

 36.5 



9.8 

 36.2 



13.0 

 54-6 



28.4 

 31-4 



22.8 

 30.2 



No. 

 199 



3" 

 15 

 II 



345 

 362 



15 



3 



218 



372' 



15 



3 



301 



315 



Per 



ct. 

 6 

 66. 



82 



No. 



223 



325 



67 



22 



375 

 367 



40 



9 



314 



38S 



42 



4 



360 



336 



397 : 

 409! 



31 



No. 



232 

 317 

 117 



55 

 31SJ63 

 367 73 



80 16. 



80 16, 

 326,65 



No. 



18 



232 



317 



10 1 



55 



259 



377 



69 



63 



310 



442 



63 



33 



373 



349 



31 



37 



382 



418 



36 



iPer 

 No.l ct. 

 18 3. 



232I77 



3i7i84 

 loi 

 55 



M.— 



per 

 ct. 



o 77 



2|23 

 O II 



8,75' 

 4 75 

 8 16. 

 6' 16 

 o 65. 

 489 

 2 16 

 6 7 

 674 

 873 



2: 8. 



4 8. 



480. 

 695 



In this trial the seeds from a total of lo individual trees were tested. 

 The results obtained by merely pulping the seed before planting were 

 so favorable that commercial planters adopted the pulping plan when 

 its merits were brought to their attention. In commercial work the 

 pulp is removed by rubbing the seeds through a wire screen of the proper 

 mesh. Many of the pulps are left behind and are swept off the screen. 

 Those that fall through with the seed cause no inconvenience in plant- 

 ing, for the seed is spread to dry for about 24 to 48 hours; and during 

 this time the pulps dry and shrink to such an extent that they readily 

 pass through the plates of the corn planter which is now used to plant 

 the pulped seed. Unless the seed is dried before planting the plates 

 of the planter become clogged, causing an uneven distribution of the 

 seeds in the row. 



TOTAL GERMINATION OF CAMPHOR SEED 



The greatly increased germination obtained when the seed is pulped 

 is remarkable. Figure 4 shows graphically the total germination of 

 both the pulped and unpulped seed from 10 parent trees. The increased 

 germination of the pulped over the unpulped seed ranged from 270 per 

 cent for tree B to 2,466 per cent for tree A, the average increase for the 

 entire lot of 10 trees being approximately 525 per cent. 



Germination was found to be uneven with seed from various parent 

 trees. Moreover, the ratio between the percentage of germination 

 of the unpulped and the pulped seed was by no means constant; and no 

 correlation can be established between the percentage of germination 



