THK H008 FIELD BARLEY SOILS. 
149 
the one on trhicli dung was discontinued in 1871 showing (also as we 
should expect) a smaller accumulation of organic carbon than the plat 
• mged continuously. 
On the whole, the proportions of nitrogen in the various plats of the 
tailcy field that have been persistently manured with chemical fer- 
tilizers resemble very closely the proportions found in the wheat plats 
more or less similarly manured, and the proportions of carbon are, on 
the whole, also very similar. 
On the rape-cake plats of the barley field the proportion of total 
nitrogen varies from about 9.12 to about 0.13. On the rape-cake 
wheat plat the quantity at about t lie same t ime ( 1 ssi ) was (>. Il'o per 
cent, or about t he same. 
The quantity of carbon in the rape-cake barley plats is from about 
1.31 to about L.37 per oent. On the wheat plat, at about the same 
period, il was about l..**7 per cent. 
On the continuously dunged barley plat the proportion of total 
nitrogen is 0.2131 per cent. On the wheal plat the proportion of 
total nitrogen at about the same period was 0.1836 percent, or rather 
less. 
The carbon in the case of the continuously dunged barley plat is 
2.486 per cent. On the wheat plat it was 2.132 pel' cent. 
The general ratio of carbon to nitrogen does not differ very much 
from that found in l he wheal plats. Kxcluding the dunged plats, the 
ratio of carbon to nitrogen on the barley plats averages 10. 5 of carbon 
to 1 of nitrogen. On the wheat plats, at about the same period, it 
averaged lo.f, to 1 . 
The continuously dunged plat on the barley field shows, in 1882, a 
rat io ol 1 1 .7 of carbon to 1 of nit rogen, while t he cont inuously dunged 
plat on the wheat field, in 1881, showed a ratio of 11.7 of carbon to 1 
of nitrogen. 
In the second !) inches of the barley soils the ratio of carbon to 1 of 
nitrogen varies from 8.7 to 9.4. In the second depth of the wheat 
soils, at about the same period, it averaged D.l. 
In the third \) inches the ratio of carbon to 1 of nitrogen varies, in 
the barley soils, from 8 to 10.1. On the wheat soils it averaged 8.7. - 
On the whole, then, there is very little difference between either the 
proportions of carbon or the proportions of nitrogen in the various 
depths of the two fields, as far as we are able to compare them. 
It should be mentioned that all these comparisons are based upon 
the percentages of nitrogen as determined in both sets of samples by 
the soda-lime method and not by the Kjeldahl process. 
NITROGEN AS NITRATES (*' NITRIC " NITROGEN). 
The nitrogen existing as nitrates was determined by Professor War- 
ington in all of the 1882 samples except those of the sodium-silicate 
seel ion, AAS. In regarding these results it must be borne in mind 
