24 
MANURING EXPERIMENTS WITH PADDY RICE. 
The effect of the various kinds and quantities of fertilizers on 
the composition of the straw and the grain, and the proportions 
to which the nutrients given entered the crops, were determined 
by chemical analyses. Owing to lack of time we had unfor¬ 
tunately to confine these researches to determinations of 
nitrogen, which were made by Kyeldahl’s method, and of 
phosphoric acid, potash, and lime, which were estimated in the 
ash prepared by incineration of the substance moistened, in the 
determinations of phosphoric acid, with a solution of barium 
hydrate. 
The nitrogen determinations in the crop obtained from the 
unmanured and partially manured plots and from those supplied 
with a complete mixture of nutrients containing different doses 
of nitrogen, gave the following results :— 
