May, 1922] 



RAINES VEGETATIVE VIGOR OF THE HOST 



227 



of sowing, setting out of doors to be inoculated, and of concluding the experi- 

 ment were the same as in experiment I described above. The results are 

 shown in table 7. 



TABLE 7 



Experiment III 



12 o plants were grown in 4^-inch pots, divided into four groups on the 

 basis of the number of plants grown to a pot. Soil, method of seeding, and 

 dates of sowing, of setting out-doors to be inoculated, and of concluding the 

 experiment were the same as in experiment I. Results are given in table 8. 



TABLE 8 



Experiment IV 



600 oat plants were grown in 4^-inch pots, 5 plants to a pot; 15 grains 

 being planted in each pot in the first place, and the young seedlings thinned 

 out to the desired number. The plants were divided into six groups of 

 100 individuals each on the basis of soil composition and treatment, as 

 follows : 



Group A : Soil composed of sand only. 



Group B: Soil a mixture of i sand and 3- garden loam. 



Group C: Soil a mixture of i sand and ^ garden loam. 



Group D: Soil the same mixture as in Group C. In addition, KC1 at the rate of 350 

 pounds to the 6-inch acre of 2,000,000 pounds was intimately mixed with the soil. 



Group E: Soil the same mixture as in Group C. In addition, acid phosphate at the 

 rate of 750 pounds to the acre was intimately mixed with the soil. 



Group F: Soil the same mixture as in Group C. In addition, sodium nitrate at the 

 rate of 500 pounds to the acre was intimately mixed with the soil. 



Seed was sown July n, 1920. On July 24, July 31, and August 7 the 

 plants of groups Z), , and F had additional quantities of fertilizer applied 



