MANURING EXPERIMENTS WITH PADDY RICE (THIRD YEAR). 
We see that in all the trials the unrecovered phosphoric acid 
had an influence on the succeeding crop ; the greatest after-effect 
was displayed by the steamed bone dust, next follow the Thomas 
phosphate, crude bone dust and Peruvian guano, then the 
precipitated phosphate, and finally come the phosphorite, double 
superphosphate, and bone ash. The differences are, of course, 
due not only to the kind of phosphate but also to the quantity 
of unrecovered phosphoric acid. In no case was the crop so 
large as that produced by means of a fresh application of 8.33 
grms. of soluble phosphoric acid on the plots with a complete 
manure, in which trial the total yield amounted per frame to 
1365 grms. and consisted of 575 grms. of full grain, 9 grms. of 
empty grain, and 7S0 grms. of straw. 
The increase of full grain over the produce on the plots not 
supplied with any phosphate, was as follows (per frame) : 
