The Worthington advance., 1878-07-18
Hp USE. IS = = I'm .XiNtD .11g..::FARM,
1xnarislehGe VIA sstillss

4, i1he following, directions for conduct
Ing experiments with fertilizers are fiv!:
fh-hy Wolh, the leading European auth:
prity On this subject: :! - .F'5a2ss: j.,
ut Is of the greatest intborihnce to the
farmer to ti1d cut which Of the, more i'm,
Pofta1t ingredients Of plant tod bis soil
!n its actual condition fails to supply III
sufficient quantity tor the ,ptodpctioa of
the largest possible crops, Ioahd which,
when directly added; ;would, therefore e1-
ie1rise hn especially aabtorable ,sna power.
fial influence. This can be done practi.
tAliy only by pr6ppetlY.l' cGj1ddctedo fsrtila
.fiink experimenits3 = It'll 'tkfs' fl NV, Il
@es;d| bef@ell, ?; sfirst, ITO i1vaAgszsomt
triah tn' which ths 'yepazate, elements g
Pldat food are employedI each by: itself
alone, i'm the form, of: 4 definite salt as
pure as possible. I propose for this end
trials with the following artieles::2: III
T. 4. PhospRddic Scid ihSdpei phmphatd,
from Baker, Guano or Nejilloaes !auane
which contains little Nitrogen On lack Of
th,a, good enperphosphate from phos:
phorite or bone black). ' ~ = ''''' u
g, Nitrogen in Chill saltpetre nitrate
of soda) or crude sulphate Of ammonia. =,
2. Potash :: in tivefnld concentrated
potash salt, which is the same as sold in
this country as ''muriate of potash, Of
00:84 per cent. (or high grade sulphate Of
potash). j = =
4. Magnesia, in epson salts {crude
sulphate of magnesia.)
5. Plaster.
6. Burnt lime,
The trials need net, by any means, ex~
tend over very large lots. Often small
plots Of five and half square rods each
will suffice. BIT the whole ground
under experiment should, by all means
be of uniform quality, and two tr three
plots must always be left unmapured for
comparison. ... 9
The arrangement ar order of the plots
It the; quality of the soil is uniform can
be planned as is most convenient, Just IS
the lay Of the land and the kind Of prep.
aration make desirable; for instance, as;
:t6llOWs:i .'.EJu j:Nra bsaa tzssTe
::: fss:s::sse'' fRiss
~ The separate materials. Should be apss ?
|'plied lin such proportions Is about cor
respond to: an. average manuring. For
instance for each FIVE rods, 10 lbs. each
Of superphosphate, epson salts and plas
ter; lbs: each of potash salt, Chill salt
peter, or su]pbatc Of ammonia, and rs lbs.
ot quick lime. The latter may be s3wn
in the fine, powdery condition which re-
suits from careful slackino with water or
gradual disintegration in the air. The
plaster should be applied in finely
ground condition: The other materiale
should be mixed before, spreading with
once or twice their bulk. Of good earth
rich in vegetable matter, or with tolerablv
moist sawdust, in order to insure
more thorough and even distribution.
The spreading should be done cons:d-
cradle time before the planting. 1t wilt
he we'll to even off the ground first with a
light harrow, spread the fertilizers, and
then work them into the soil with strong
harrow In the usual way. 1t is still better
to turn the fertilizers under by shallow
| p1oughlng, ana then proceed with the
preparation and planting Of the field as
usual. 1t the seperate plots are once ac-
curately staked of, and the fertilizers
carefully distributed in their appropriate
divisions, the plough aud harrow NAV be
passed freely from one plot to another
without fear of any considerable shifting
of the fertilizers, especially when un-
manured spaces two feet wide are left
between the plots, and, after planting,
left as paths. Tne trials should be made
on land which is exhausted, in the agri-
cultural sense of the word, and would, in
ordinary practice, have been sgain dressed
with stable manure. They should be re
peated for at least three to six years in
succession, in the same manner, with the
same quantity Of fertilizers on the same
plots, each year, only changing the crops
to be raised, as the course of rotation le-
quires."