yself,
I used some $400 worth of guano on wheat this fall, the whole of it
mixed with plaster. I believe the effect of the mixture will not be so
vigorous on the first crop, as guano by itself--the plaster husbanding
the ammonia for succeeding crops, upon which the mixture, (if the theory
be correct,) will have more effect than guano unmixed, that being
exhausted by the first crop."

A gentleman after making sundry careful experiments with plaster and
carbonate of ammonia, thus expresses his conclusions--"These experiments
prove to me that no matter in what state, (whether _wet_, _moist_, or
_dry_,) plaster is presented to guano, or any other manure from which
the carbonate of ammonia is escaping, it must retain a certain amount of
ammonia that would otherwise be lost in the atmosphere."

The editor of the American Farmer says--"If the soil be poor, and it be
desired to permanently improve it, at least four hundred pounds of
guano, without respect to the fixer used, should be spread _broadcast_,
on every acre of it, and plowed in to the full depth of the furrow. If
the land be in moderate heart, three hundred pounds will be enough per
acre. Where the soil may be good, two hundred will be sufficient. These
quantities, as the reader will observe, have relation to broadcast
applications, as all should be where general improvement is
contemplated; if compelled to confine his experiments on corn to
applications in the hill, a form of manuring, we have ever disapproved,
two hundred pounds, or even one hundred of guano, will manure an acre,
mixed with a bushel of plaster, five bushels of slaked ashes, and a
double horse cart of wood mould more effective than ten loads of manure
applied in the hill."

Yes, as has been proved by careful experiment made in England, more than
fourteen tons of manure. The editor also says, what we have so often
repeated--"We hold these to be agricultural truths--that guano is most
beneficially applied, when ploughed in as spread on the the earth, never
less than four inches deep--and better, for permanent effect, to be
ploughed in deeper, say six to eight inches--where it may be desirable
only to bury it four inches deep, the land should be previously ploughed
as deep as the furrow can be turned up, and the guano applied at a
second ploughing--that all top-dressings with guano are wasteful,
inasmuch, as from the volatile nature of the more active parts of the
manure, great loss must inevitably r