CONTRIBUTIONS FROM THE WISLEV LABORATORY 



493 



There was a decrease of 10 per cent, in the average yield from 

 inoculated plants as compared with the iminoculated, and a decrease was 

 shown in four out of the six rows in weight of peas and five out of the six 

 in weight of pods as gathered ; the results obtained by taking the total 

 yield of each row of 1 Ne Plus Ultra ' for comparison, instead of the 

 average yield from each plant in the respective rows, showed a decreased 

 yield of shelled peas from the inoculated rows in four cases out of six and 

 of pods as picked in four cases, while in one the yields were practically 

 equal. 



The results obtained by the two methods thus completely support one 

 another. 



Turning now to the variety ' Maincrop ' on the cultivated ground we 

 have the following figures : — 



TABLE R. 



Average Yield of Plants of ' Maincrop ' from Plots I. to XII. 

 (Cultivated Ground). 



Seed not inoculated 



Seed inoculated 



Percentage 

 increase or 

 decrease 





No. of 

 plants 



Aver, 

 wt. of 

 pods 



Aver, 

 wt. of 

 peas 





No. of 

 plants 



Aver, 

 wt. of 

 pods 



Aver, 

 wt. of 

 peas 



Wt. of 

 pods 



Wt. of 

 peas 







grs. 



grs. 







grs. 



grs. 







Plot I. 



49 



86-5 



43-1 



Plot II. . 



44 



941 



44-7 



4-8 



+ 3 



IV. . 



52 



953 



466 



„ III. . 



34 



93-6 



551 



-2 



+ 18 



„ v.- 



41 



118-4 



52-3 



„ VI. . 



47 



93-6 



45-9 



-21 



- 13 



.. VIII. . 



49 



115-0 



51-5 



„ VII. . 



44 



106-8 



50-8 



-8 



-2 



M IX. . 



43 



1321 



612 



„ x. . 



33 



112-4 



50-4 



-15 



-18 



„ XII. . 



32 



125-9 



54-9 



» XI. . 



38 



126-5 



52-8 



o 



-4 





266 



110-5 



511 





240 



103-9 



49-6 



-6 



-a 



In this case there was a decrease of 6 per cent, in the average weight 

 of pods as picked from the inoculated plants as compared with the 

 uninoculated, and of 3 per cent, in the weight of shelled peas, and a 

 decrease was shown in four rows of the six in each estimation of the 

 crop. The results obtained by taking the total yield of each row of 

 ' Maincrop ' for comparison, instead of the average yield from each plant 

 in the respective rows, showed a decreased yield of pods as picked from 

 the inoculated rows in four cases out of six, and the name proportion 

 of cases of decreased yield when the weight of shelled peas was 

 compared. 



Both methods of measuring the yield, therefore, tell the same tale 

 when the peas grown on the cultivated soil are compared. 



It is interesting also to compare the average yields from the plants in 

 the first four plots. In the variety 1 Ne Plus Ultra ' the lowest average 

 yield was on Plot II., which received inoculated seed, the soil as well 

 being inoculated, and on this plot with 1 Maincrop ' was the lowest 

 average yield but one. 



