Some 01>s>r ira.\ i >iia oit Alaiiuriiig- M'itlt Bone-dnat. 



Average of two parallel pots. 



115 



If we now assume the total yield with the manure of the group iv to 

 be= TOO, we obtain the following ratio : 



I 



lOI 



ir 

 107 



III 

 100 



IV 

 100 



Hence there was no decisive difference between the effects of potassium 

 sulphate and potassium carbonate when the nitrogen was added as nitrate. 



Experiment with Soy-bean. 



Eight zinc pots were manured as follows 



i). The weight of one plant in the group I would therefore be 7 g. in the airdry state 

 (105-5-15 = 7). 



2). The average weight of One plant in the group IV was again 7 g. (105.7-5-15 = 7). In the 

 first experiment, when bone dust was applied together with ammonium n'trate and gyfsum, the 

 average weight of one plant was also 7 g. (62."-5-3~7). 



