30 



G. Daikuliai-a and T. Imaseki. 



Plants in the nitrate pots showed the yellowish green color of the young 

 growing leaves especially in those which received organic manures together 

 with nitrate. The tests showed always much more nitrate (at least more 

 than 3 times as much) in the yellowish leaves than in the normally green ones 

 grown with (NHJ^.SO^ as a manure. But nitrate could not be observed by 

 Griess' test in the yellowish green leaves. 



The photograph taken Feb. 19, 1906, and reproduced on plate XVIII 

 shows clearly the differences of growth. The plants weighed in the air dry 

 state gave the following result : 



i). The gain of N by soluble N-salts was calculated by subtracting the yield of control pot 

 from those of pot I, II, and III, the yields of VIII, IX, X and XI from those of IV, V, VI and VII 

 respectively. 



