THE BROAD BALK WHEAT SOILS. 
.so 
than that of plats 10 and 11, receiving ammonium ehlorid (and sul- 
phate) with ami without phosphates. The quantity of chlorin con- 
tained in the produce of plat 12, to which sodium sulphate is applied 
in addition to the ammonium ehlorid, ammonium sulphate, and super- 
phosphate, is, in relation to its weight, a little — but not much — higher, 
and still a little higher in the ease of the dunged plat. But all these 
plats, with 1 he exception of 7 and 13, show a rat io of chlorin to produce 
comprised within a range of from 0.68 (unmanured plat) to 1.09 
[dunged plat) per 1,000 pounds of grain and straw. Hut on plats 7 
ami 13, tie- plats which, in addition to ammonium salts and super- 
phosphate, receive potassium sulphate, the rat ios of chlorin to produce 
are L. 65 and 1.00, respectively, per 1,000 pounds of produce. These 
two plats arc the healthiest, most flourishing, and most abundantly 
yielding of all t he chemically manured plats, as has been already more 
than once pointed out; and their prosperous condition is without 
doubt the direct result of the potash supplied to them. But the 
dunged plat is also a prosperous plat, ami yields heavier crops than 
these; yet the chlorin contained in a given weight of its produce is 
much less than in 1 he case <»f plats 7 and 13. The presence of the 
increased quantity of chlorin in the crops, therefore, can not be 
regarded as merely a necessary index of well-being or of vigorous 
growl h. 
The high ratio of chlorin to produce on plats 7 and 13 can not be 
attributed to accident. Not only arc the plats far apart on the field, 
but their altogether exceptional chlorin contents are deduced from 
analyses of the ashes ranging over forty years, and the high chlorin 
results in the crops of both plats are persistently shown in each ten 
Spears' average. 
( hlorin is applied to the soil in the form of ammonium ehlorid ; but 
this form we know, of course, it can not retain, for its ammonia is 
converted into nitrates, and the chlorin must combine with other 
bases, the most obvious being calcium. It seems possible that the 
calcium ehlorid first formed may to some extent decompose the potas- 
simn sulphate present on these plats, forming potassium ehlorid, and 
that potassium ehlorid maybe more freely taken up by the plants 
than sodium ehlorid. It is true that plat L3 was found, in the 1893 
soil sample, to contain in its second depth a much larger quantity of 
chlorin than its neighbors — plats 11, 12, and 14; but this was not 
noticed to be the case with plat 7. 
We have records of the potash contained in the crops over the same 
period, and from these il appears thai increase in the potash contained 
in the crops per acre is in every ease accompanied by an increase 
in the chlorin contained in the crops; and if, instead of regardingthe 
quantities per acre, we regard the quantities contained per 1,000 
pounds of produce, and take the plats that are strictly comparable 
(e. g., plats 11, 12, 13, 14, and 7), including also plat 2, we find that 
