114 



S. Vcliiyaina. 



Nutrients!). 



Sodium nitrate ... , 



Bone dust 



Potassium carbonate 



Wood ash 



Potassium sulphate 



I 



2.84 g. 

 6.0 g. 

 2-5 g- 



II 



ditto, 

 ditto. 



15-5 g- 



III 



3-^ g- 

 4 04g- 



15-5 g- 



IV 



2.84 g. 

 6.0 g. 



3-2 g. 



Total nitrogen 



„ phosphoric acid 

 „ potassa 



0.61 g. 

 1.66 g. 

 1.70 g. 



ditto. 

 2.29 g. 

 ditto. 



ditto. 

 1.66 g. 

 ditto. 



ditto, 

 ditto, 

 ditto. 



Ten seeds of soy-bean previously steaped in water were sown per pot 

 June 6. The young shoots appeared after five days, except in pots iv 

 (K2SO4), which came up three days later. The plants were reduced later on 

 to six per pot of about equal size. All plants showed nearly equal 

 development, only those of the pots 11 seemed always somewhat a head-\ 

 The following table shows the height of the plants on Sept. 2 1 : 



Average of two parallel pots. 



The plants were harvested on Sept. 21, and weighed in the air-dry 

 state with the following result, g. : 



i). The nutrients were the same as those applied in the former experiment, except the sample 

 of potassium carbonate which was here quite pure. 



2), In the pots II the amount of phosphoric acid was larger than in the other pots, since the 

 phosphoric acid of the wood ash was added to the dose of bone dust in I and IV, 



