MANURING EXPERIMENTS WITH PADDY RICE. 
13 
III. Series. 
Phosphoric acid, kilogrms. 0 
5 
IO 
1 5 
20 
25 
3 ° 
Panicles 
IV. Series. 
.. 1013 
054 
1429 
1554 
1638 
1638 
1850 
Potash, kilogrms. 
0 
5 
IO 
15 
20 
25 
Panicles 
186g 
1690 
1667 
1638 
1842 
V. Series. 
Lime, kilogrms.o 20 40 
Panicle .1638 1829 1796 
VI. Series. 
Green manure, 
and lime, kilogrms. of lime .. o 20 30 40 
Panicles.1175 1300 1313 1246 
On the unmanured plots there was no gain of panicles by 
tillering, on the contrary a few plants had perished. The 
absence of phosphoric acid and nitrogen from the manures, 
too, prevented any considerable increase by tillering. When 
however, to a manure otherwise complete, nitrogen was also 
added (2nd series), a remarkable increase of panicles was 
noticed ; and the same result took place when to a manure 
complete in other respects but free from phosphates (3rd series), 
the latter were also admixed. In both these cases the gain of 
panicles by tillering kept pace, up to a certain limit, with the 
supply of the said nutrients. The addition of potash to the 
nitrogenous and phosphatic manure in the 4th series hardly 
manifested any effect, and the lime, too, in the 5th and 6th 
series exerted only a slight influence. These observations in¬ 
dicate that on our soil nitrogenous and phosphatic fertilizers, 
when combined, act most powerfully, while potash and lime 
are less needed as direct manures, because the soil contains 
enough of them for the successful cultivation of rice. 
The weight or size of the full (i.e. normally developed) grains 
is also affected by the different supply of manures, though not 
to a considerable extent, the greatest difference of the weight 
of 1000 unhulled grains being less than 2.5 grms. The general 
law that the more plants are raised on a given area, the smaller 
is the size of the grains is confirmed by our researches 
