Oxford Democrat. [volume] (Paris, Me.) 1833-1933, 1857-05-15

IN estimate the al,anticrs dcriycdirom each
. or its uumcrou. constituents, we have come
o. ~, tia, il may not in an cases be an in
di,yeus,hlc manure, hut may 20 a certain
, extent b, replaced nv other substances. In
fact. when We inquire more minutely into
the cau,, Of the diminished fertility or s'il
from which a succession Of crops has h'cn
removed. IL !. found rarely q DEPEND on mo
general exhaustion of ull the requisite clr-
mcn,s, but most commonly on the deficiency
. of one or more substances which have been
, removed by certain number of crors, whilc
the o,hyr- .,ll remain IN suiicisu, album
, lanc,. And hence the fertility depends uo;
+ ,l much on thosc substance, which arr
thunlau,. as Ia tho.c which arr mrst def
rs,nt. and the absence OF which renders the
other, useless, because the plants cannot
grow without an adequate supply OF aHthcr
constituents. \ soil in this condition does
not absolutely rcquirr f'rm.yarl manure,
but may hc again made 6, produce ahun.
Ism, crop. hy ,hc application Ut the one de-
dci.ut Substance, which is then called a
special manure. When 81, treated, .oil
win rcuin ,h., renewed fertility Tor c.r.
tam time, bu; a, length becomes again in.
fertile, even under continued application
.of tins manure. which i. then said, IN oril.
. nary language. 20 aavc lost u. effect, al
though the real reason j. that the supply Of
a second constituent has bcen exhausted,
aud 1t also must bo supplied in the form Of
a manure.
In all that Trccclcs, We have supposed 1t
% b. required merely to kcyp oPa certain
moirrlt, fertility, such an ordinary s'il
may D., supposed To possess in state Of IA.
urc. But agriculture does a good deal
more than this, and seeks TO produce lars-
cr amount OF vegetation than the natural
slil eau DO, without cItnueous a,i--an
,l,ct which may manity,,ly o. produced by
,upplie. Of flrm-yarl manure, Sufficient 70
. aGorl a superabuudance Of all the different
, constituent, o.! rlants. But iii. Obvious
that wc may slc,csl equally well without
I, H.. IT, a,vll frequently harrcn. some Of
trc constituent, hr abundant, and tbcir
uulity b. limited hy ,he deficiency Of only
one or two. Thus, lor instance, W. may
conceive a soil containing a ,uprrabundanco
.orau ihc mineral elements OF the plant, but
.uo ammonia % o,heruiirosrnous matter, in
which cas- thc produce will be- limited by
b tbc quantity Of ammonia which the plants
, can obtain from the air during the period of
{ growth, and may De- greatly increased by a
sr.gial mauure Containing nothing 1ut that
Substance; 30, Likewise, i; may happen that
even where Garm-yarI manure has been ap-
piled in very largo quantity, the addition Of
, special manure may ''ill be advantageous :
because, as ordinary dun; consists OF the
constituents OF plants, ministries substances
4. which have heen retained by the animals
, which i,i upon ihem' It may BE- de'ira'l'
! % supplement Deficiencies 50 produced or
, 10 thc crop 6, which IL Is applied happen tn
u. acquire au unusually large quantity 90. any
particular element, it may BE- advisable %
add an extra quantity Of that sub'tan,', 80
Il. - to briu, out the full effect OF it. other
constituents.
I; cannot Gail to be observed that, accord
= ius to the definition now given, there Is -
f, very important distinction to be drawn be-
q tween a general aud special manure.
" When the former is used, all the constituents
r 1i plants are added to the soil AMI not only
, &, il, fertility muntaincd but, If they b,
D.. us'l with sufficient libsraliiy, it. productive
b. capacity may Dc materially increased -
+. Whereas, on the other hand, special ma.
!. uurc add, noibln: {, thcpcrmancnt fertility
n OF the soil, but only renders lis existing con-
b ,tituen,s more rapidly available, and hastons
rather than delcrs is exhaustion. Sach,