224 Journal of Agricultural Research voi. xvii. No. s 



Table I. — Condition and treatment of camphor seed selected for germination tests con- 

 ducted in igi6-ij 



PARENT TREE A 



The first experiments were conducted in the winter of 191 6-17. From 

 some previous experience it was found that by removing the pulp from 

 around the seed, germination was hastened if not materially increased. 

 It was decided, therefore, to give special attention to the effect of removal 

 of the pulp from the seed, since if it proved to be a decided aid to germi- 

 nation, the adoption of this method of treatment by commercial growers 

 would be of distinct advantage. The remainder of the seed from the 

 selected trees was pulped and planted. The percentage of germination 

 was high, but the results are not recorded here since no data were 

 secured on unpulped seed from the same trees. 



The seed bed had been well prepared one week previous to the plant- 

 ing of the first seed, and a quantity of dry velvet-bean vines had been 

 turned under. Drills from i ^ to 2 inches deep were opened with a hoe 

 and the seed carefully hand-planted at intervals of 2 inches. The soil 

 was placed back in the drill and very firmly packed. At the time of 

 planting the soil was moist and in good condition, but later in the spring 

 after the seedlings were several inches high it became necessary to 

 water the bed three times in order to maintain the moisture content. 

 On May 7 and August i, 191 7, the seed bed was fertilized with goat 

 manure analyzing: Moisture 20 per cent, ammonia 1.5 per cent, and 

 potash (as KjO) 2.5 per cent. One hundred pounds were used at each 

 application, which was at the rate of i ton per acre. The seedlings were 

 well cared for by cultivating and hoeing. Table II gives the date of 

 planting, rate of germination, and total percentage of germination in 

 the 1 91 6-1 7 trial of seed from parent tree A. 



