40 Martin J. Prucha 



TABLE 5. Results of Fihst Inoculation Test. The Cultures Were Ten Days Old 



Plants inoculated with 



Number 



of 

 plants 



Number 



of 



plants 



with 



nodules 



Total 

 number 



of 

 nodules 



Ninnber 



of 



nodules 



per plant 



Clay 



Sandy loam 



Sandy soil 



Fine quartz sand. . 

 Coarse quartz sand 

 Carborundum 



Clay 



Sandy loam 



Sandj^ soil 



Fine quartz sand. . 

 Coarse quartz sand 



Carborundum 



Agar slope culture. 

 Controls 



17 

 23 

 14 

 15 

 19 

 11 



31 

 81 

 45 

 9 

 

 25 



1.8 



3.5 



3.2 



0.6 







2.3 



10 

 15 

 18 

 13 

 18 

 14 

 19 

 13 



6 

 10 

 10 



7 

 12 



4 

 15 



3 



51 

 90 

 67 

 92 

 94 

 23 

 90 

 15 



5.1 

 6.0 

 3.7 

 7.1 

 5.2 

 1.6 

 4.7 

 1.2 



TABLE 6. 



Results of Second Inoculation Test. 

 Days Old 



The Cultures Were Forty-six 



Plants inoculated with 



Number 



of 

 plants 



Number 



of 



plants 



with 



nodules 



Total 

 number 



of 

 nodules 



Number 



of 



nodules 



per plant 



Clay 



Sandy loam 



Sandy soil 



Fine quartz sand. . 

 Coarse quartz sand 

 Carborundum 



Clay 



Sandj^ loam 



Sandy soil 



Fine quartz sand . . 

 Coarse quartz sand 



Carborundum 



Controls . 



5 



12 

 12 

 10 



4 

 11 



3 



4 



14 



8 



7 



10 



36 



3 

 3 



14 

 7 

 6 

 4 



13 



53 

 79 



151 

 58 

 41 



113 



20 



45 



188 



190 



78 



32 



120 



10.6 

 6.6 



12.6 

 5.8 



10.3 



10.3 



6.7 

 11.3 

 13.4 

 23.8 

 11.1 

 3.2 

 3.3 



