TALKS ON MANURES A SERIES OF FAMILIAR AND PRACTICAL TALKS BETWEEN THE AUTHOR AND THE DEACON, THE DOCTOR, AND OTHER NEIGHBORS, ON THE WHOLE SUBJECT
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o the American Farmer.-- The growth of Wheat Year after Year on the same Land, unmanured, with Farm-yard Manure, and with various Organic and Inorganic Fertilizers.
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immediately active and available. It is unquestionably true, that the same amount of nitrogen in barn-yard manure, will not produce so great an effect as its theoretical value would in
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for twenty-seven years, there has been a great loss of nitrogen. The same remarks apply to this case. No one ever advocates summer-fallowing land every other year, and sowing nothing
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d grass, root, stem, and branch, all are composed or made up of these same dozen elements. If I ask you what bread is made of, you say it is composed of the dozen elements aforesaid. I
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refreshes the plants, and fills the leaves with sap, precisely in the same way. All these fertilizing effects, however, belong to climate. It is inaccurate to associate either mulching
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and on the other. This will give you some good, rich muck, and at the same time drain your swamp. Then cut some _under-drains_ from _y_ towards the higher land at _w_, _v_, and _h_, an
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om the soil. In this way the “condition” of the soil would remain the same. If we sell _less_ than we develop, the condition of the soil will improve. By “condition,” I mean the amoun
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ed at the breweries with the “grains,” and are sold to milkmen at the same price--from 12 to 15 cents per bushel. Where their value is not known, they can, doubtless, be sometimes obta
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enting in an exposed heap for six months, it still contains about the same _percentage_ of water. When kept in the heap until August, the percentage of water is much greater. Of four t
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gen, and 30¾ lbs. of soluble mineral matter. If they buy a ton of the same manure that has been kept under cover until February, they get, nitrogen, 15 lbs.; soluble minerals, 42½ lbs.
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, and the manure becomes rapidly deteriorated in value, whilst at the same time it is diminished in weight. “21. Well-rotten dung is more readily affected by the deteriorating influen
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garden, more than two loads of the straw and corn manure. To get the same amount of nitrogen, phosphoric acid, and potash, you have to spend more than twice the labor in cleaning out
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imes, when comparatively dry, we use the refuse sheep bedding for the same purpose. Where the sheep barn is contiguous to the pig-pens, and when the sheep bedding can be thrown at once
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iately available. It makes it more soluble. We ferment manure for the same reason that we decompose bone-dust or mineral phosphates with sulphuric acid, and convert them into superphos
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nd in the manure.” How to keep cows tied up in the barn, and at the same time save all the urine, is one of the most difficult problems I have to deal with in the management of manur
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nd supporting 20 cows, would give us a gross return of $1,204.50. The same farm so improved as to produce 2¼ tons of hay or its equivalent, per acre--fed to 20 cows _capable of eating,
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this, his land has been growing richer and richer. And, in fact, the same is true of Mr. Geddes’ farm. It is richer land to-day than when first plowed, while there is one field that f
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80.4 ” ” ” ” Fresh solid cow-dung contains, according to the same authority, 90 per cent of water. I have frequently seen manure drawn out in the spring, that had not been de
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arch, April, May, and June, than wheat; and, consequently, to get the same amount of food, it is not necessary that the clover should have as much nitrogen, phosphoric acid, potash, et
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es of wheat, and as much potash as the produce from five acres of the same crop. Clover thus unquestionably removes from the land very much more mineral matter than does wheat; wheat,
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s, containing 61 lbs. of nitrogen; that is, there was very nearly the same quantity of roots and nitrogen in them, as that furnished in the soil from the brow of the hill. “The roots,
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f nitrogen per acre, that is, considerably more than was found in the same section of the soil where the clover was mown twice for hay; showing plainly, that during the ripening of the
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cre, and contained 100 lbs. of nitrogen. A few yards distance, on the same soil, where the clover was bad, the acre of roots contained only 31 lbs. of nitrogen per acre. So far, so go
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ments at Rothamsted on the Growth of Wheat, Year After Year, on the Same Land. Table 1.--Manures And Produce; 1st Season, 1843-4. Manures and Seed (Old Red Lammas) Sown Autumn 1
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f manure again in 1845?” “Precisely that, Deacon,” said I, “and this same plot has received this amount of manure every year since, up to the present time--for these same experiments
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of corn and 789 lbs. of straw, which was the increase obtained by the same amount of ammoniacal salt on 10_a_, as compared with 10_b_. “It will be observed, however, that in the forme
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monia-salts alone on plot 10_a_, gave 19¼ bushels per acre, while the same quantity of ammonia, with superphosphate in addition, gave, on plot 9_b_, 25 bushels per acre. The addition
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--“What have you here?” --“Ammonia,” said I; and at 6_b_ he asked the same question, and I replied “ammonia.” At 7_a_, the same question and the same answer. Standing between 7_b_ and
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that the next year and the year after, the salt _was_ applied at the same time as the other manures. It gave an increase of 94 lbs. of grain and 61 lbs. of straw in 1851, but the foll
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uite 29 bushels per acre, and only weighed 55 lbs. per bushel. On the same plot, the year before, with precisely the same manure, the yield was nearly 37 bushels per acre, and the weig
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e consider that this is the twentieth wheat-crop in succession on the same land, these figures are certainly remarkable. “They are so,” said the Deacon, “and what to me is the most su
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king them together in a bottle, and allowing the soil to subside, the same result was obtained. The action, therefore, was in no way referable to any physical law brought into operatio
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s in the spring assumed a rich, dark green color. I have observed the same effect where coal-ashes were spread on grass-land; and I have thought that the apparent benefit was due large
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shes Experiments on the Growth of Barley, Year After Year, on the Same Land, Without Manure, and With Different Descriptions of Manure, Hoos Field, Rothamsted, England. Tabl
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rs.] Experiments on the Growth of Barley, Year After Year, on the Same Land, Without Manure, and With Different Descriptions of Manure, Hoos Field, Rothamsted, England. Tabl
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traw. “That will do,” said the Deacon, “but I see that in 1857, this same plot, with the same manure, produced 66½ bushels of dressed grain per acre, weighing 53½ lbs. to the bushel,
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nips does not enrich land for grain crops. Turnips were grown on the same land, year after year, for ten years. The land was then plowed and sown to barley for three years. The follow
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them. In 1857, I made the following experiments on potatoes, in the same field on which the preceding experiment was made in 1852. In this case, as before, the land was a two-year-o
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n autumn, has afforded a yield of about 70 bushels per acre, when the same amount applied in spring, gave only 50 bushels. A thin coating of manure applied to winter-wheat at the time
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And such facts and experiments as we have, seem to indicate that the same is also true of Indian corn. It is, at any rate, reasonable to suppose that, as Indian corn belongs to the sa
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Plot 10, with 400 lbs. of unleached wood-ashes per acre, produces the same quantity of _sound corn_, with an extra bushel of ‘nubbins’ per acre, as plot 1, without any manure at all; a
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gave an increase of 14½ tons per acre. And the following year, on the same land, it gave an increase of 13½ tons; and the next year, on the same land, over 9 tons.” “Yes,” said I, “th
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res did any good. Ellwanger & Barry also tried them, and reported the same negative result. This was several years ago, and I do not think any similar experiments have been made since.
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e land_, $1.06. “A ton of the fresh fæces,” said the Deacon, “at the same estimate, would be worth (20 lbs. nitrogen, at 20 cents, $4; 21¾ lbs. phosphoric acid, at 12½ cents, $2.70),
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ticle.” As to whether it is better, when you can buy nitrogen at the same price in nitrate of soda as you can in sulphate of ammonia, to use the one or the other will depend on circum
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crop of wheat. And the experience of farmers everywhere tends in the same direction. England is the greatest turnip-growing country in the world, and you will find that where one farm
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e, this was to be expected, and they had expected it much sooner. The same with wheat; he expected the end would come in a few years, but they had now gone on between 30 and 40 years.
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y giving to it the food necessary to grow good grasses, sowing at the same time a small quantity of the best seeds. I further suggested that a flock of sheep should be allowed to run o
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se in the fall for wheat, on land that has been cropped with oats the same year. The manure put on for potatoes is generally estimated to enrich the land sufficient for it to produce o
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ng for, 35-168 ” the 20th Crop on Same Land, 213 ” Top-dressing for, 270 ”
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value.” “Suppose, Deacon,” said he _quotation marks as in original (same speaker)_ carbonaceous matter and water, of little or no value?” _text has question mark after close quote_
| Increase per | | |
Produce per Acre, etc. |Acre by Manure.| | | P
--------------+----+----+----+----+---------------+ | | l
Dressed corn. | | | | | | | | | | o
--------+-----+ | | | | | | TP | | | t
Qty.[5] |Wt/Bu| OC | TC | S&C| TP | C | S&C | C&S| OCD |C100| s
--------+-----+----+----+----+----+----+-----+----+-----+----+----
Bu. Pks.|lbs. |lbs.|lbs.|lbs.|lbs.| lbs| lbs.|lbs.| | |
32 0 |56.5 |159 |1967|3977|5944| 526| 1265|1791|10.9 |49.5| 0
26 1¼ |54.8 |248 |1689|3699|5388| 248| 987|1235|17.3 |45.7| 1
32 0 |56.8 |151 |1967|3915|5882| 526| 1203|1729| 8.9 |50.2| 2
23 0¾ |56.5 |131 |1441|2712|4153| .. | .. | .. | 8.7 |53.1| 3
29 2½ |58.0 |161 |1879|3663|5542| 438| 951|1389| 9.4 |51.3| 4
22 2¼ |57.5 |134 |1431|2684|4115| -10| -28| -38|10.1 |53.3|1}5
26 3¾ |57.3 |190 |1732|3599|5331| 291| 887|1178|14.2 |48.1|2}
28 2¾ |57.8 |214 |1871|3644|5515| 430| 932|1362|14.1 |57.3| 6
26 2¾ |57.0 |161 |1682|3243|4925| 241| 531| 772|11.3 |51.9| 7
27 0½ |56.3 |164 |1716|3663|5379| 275| 951|1226|14.0 |46.9| 8
33 1½ |58.3 |187 |2131|4058|6189| 690| 1346|2036|10.2 |52.5| 9
31 3¼ |56.3 |191 |1980|4266|6216| 539| 1554|2093|12.3 |46.4| 10
30 3 |56.0 |158 |1880|4101|5981| 439| 1392|1831|11.3 |45.8| 11
28 2¼ |55.8 |264 |1842|4134|5976| 401| 1422|1823|17.8 |44.5| 12
25 0 |56.3 |152 |1558|3355|4913| 117| 643| 760|12.0 |46.4| 13
27 1 |57.5 |176 |1743|3696|5439| 302| 981|1286|16.2 |47.1| 14
32 3¾ |57.3 |209 |2103|4044|6147| 662| 1332|1994|11.8 |52.0| 15
32 2¼ |56.3 |182 |2028|4191|6219| 587| 1479|2066|11.1 |48.4| 16
32 0¾ |55.8 |299 |2093|3826|5919| 652| 1114|1766|15.2 |54.7| 17
33 1¼ |56.5 |180 |2948|3819|3867| 607| 1107|1714|11.2 |53.6| 18
34 3 |57.0 |133 |2114|4215|6329| 673| 1503|2176| 9.1 |50.2| 19
24 2¾ |56.0 |113 |1495|3104|4599| 54| 392| 446| 9.7 |48.2| 20
.. .. | .. | .. | .. | .. | .. | .. | .. | .. | .. | .. | 21
.. .. | .. | .. | .. | .. | .. | .. | .. | .. | .. | .. | 22
--------+-----+----+----+----+----+----+-----+----+-----+----+----
[Note 1: The silicate of potass was manufactured at a glass-house,
by fusing equal parts of pearl-ash and sand. The product was a
transparent glass, slightly deliquescent in the air; it was ground
to powder under edge-stones.]
[Note 2: The manures termed superphosphate of lime and phosphate
of potass, were made by acting upon bone-ash by means of sulphuric
acid, and in the case of the potass salt neutralizing the compound
thus obtained, by means of pearl-ash. For the superphosphate of lime,
the proportions were, 5 parts bone-ash, 3 parts water, and 3 parts
sulphuric acid of sp. gr. 1.84; and for the phosphate of potass,
4 parts bone ash, water as needed, 3 parts sulphuric acid of sp. gr.
1.84; and an equivalent amount of pearl-ash. The mixtures, of course,
lost weight considerably by the evolution of water and carbonic acid.]
[Note 3: The medicinal carbonate of ammonia; it was dissolved in
water and top-dressed.]
[Note 4: Plot 5, was 2 lands wide (in after years, respectively,
5_a_ and 5_b_); 5.1 consisting of 2 alternate one-fourth lengths
across both lands, and 5.2 of the 2 remaining one-fourth lengths.]
[Note 5: Top-dressed at once.]
[Note 6: Top-dressed at 4 intervals.]
[Note 7: Peruvian.]
[Note 8: Ichaboe.]
The season of 1845 was more favorable for wheat, than that of 1844, and
the crops on all the plots were better. On plot No. 3, which had no
manure last year, or this, the yield is 23 bushels per acre, against 15
bushels last year.
Last year, the 14 tons of barn-yard manure gave an _increase_ of only 5¼
bushels per acre. This year it gives an increase of nearly 9 bushels per
acre.
“Do you mean,” said the Deacon, “that this plot, No. 2, had 14 tons of
manure in 1844, and 14 tons of manure again in 1845?”
“Precisely that, Deacon,” said I, “and this same plot has received this
amount of manure every year since, up to the present time--for these
same experiments are still continued from year to year at Rothamsted.”
“It is poor farming,” said the Deacon, “and I should think the land
would get too rich to grow wheat.”
“It is not so,” said I, “and the fact is an interesting one, and teaches
a most important lesson, of which, more hereafter.”
Plot 5, last year, received 700 lbs. of superphosphate per acre. This
year, this plot was divided; one half was left without manure, and the
other dressed with 252 lbs. of pure carbonate of ammonia per acre. The
half without manure, (5a), did not produce quite as much grain and straw
as the plot which had received no manure for two years in succession.
But the wheat was of better quality, weighing 1 lb. more per bushel than
the other. Still it is sufficiently evident that superphosphate of lime
did no good so far as increasing the growth was concerned, either the
first year it was applied, or the year following.
The carbonate of ammonia was dissolved in water and sprinkled over the
growing wheat at three different times during the spring. You see this
manure, which contains no _mineral_ matter at all, gives an increase of
nearly 4 bushels of grain per acre, and an increase of 887 lbs. of
straw.
“Wait a moment,” said the Deacon, “is not 887 lbs. of straw to 4 bushels
of grain an unusually large proportion of straw to grain? I have heard
you say that 100 lbs. of straw to each bushel of wheat is about the
average. And according to this experiment, the carbonate of ammonia
produced over 200 lbs. of straw to a bushel of grain. How do you account
for this.”
“It is a general rule,” said I, “that the heavier the crop, the greater
is the proportion of straw to grain. On the no-manure plot, we have,
this year, 118 lbs. of straw to a bushel of dressed grain. Taking this
as the standard, you will find that the _increase_ from manures is
proportionally greater in straw than in grain. Thus in the increase of
barn-yard manure, this year, we have about 133 lbs. of straw to a bushel
of grain. I do not believe there is any manure that will give us a large
crop of grain without a still larger crop of straw. There is
considerable difference, in this respect, between different varieties of
wheat. Still, I like to see a good growth of straw.”
“It is curious,” said the Doctor, “that 3 cwt. of ammonia-salts alone on
plots 9 and 10 should produce as much wheat as was obtained from plot 2,
where 14 tons of barn-yard manure had been applied two years in
succession. I notice that on one plot, the ammonia-salts were applied at
once, in the spring, while on the other plot they were sown at four
different times--and that the former gave the best results.”
The only conclusion to be drawn from this, is, that it is desirable to
apply the manure _early_ in the spring--or better still, in the autumn.
“You are a great advocate of Peruvian guano,” said the Deacon, “and yet
3 cwt. of Peruvian guano on Plot 13, only produced an increase of two
bushels and 643 lbs. of straw per acre. The guano at $60 per ton, would
cost $9.00 per acre. This will not pay.”
This is an unusually small increase. The reason, probably, is to be
found in the fact that the manure and seed were not sown until March,
instead of in the autumn. The salts of ammonia are quite soluble and act
quickly; while the Peruvian guano has to decompose in the soil, and
consequently needs to be applied earlier, especially on clay land.
“I do not want you,” said the Deacon, “to dodge the question why an
application of 14 tons of farmyard-manure per acre, every year for over
thirty years, does not make the land too rich for wheat.”
“Possibly,” said I, “on light, sandy soil, such an annual dressing of
manure _would_ in the course of a few years make the land too rich for
wheat. But on a clayey soil, such is evidently not the case. And the
fact is a very important one. When we apply manure, our object should be
to make it as available as possible. Nature preserves or conserves the
food of plants. The object of agriculture is to use the food of plants
for our own advantage.”
“Please be a little more definite,” said the Deacon, “for I must confess
I do not quite see the significance of your remarks.”
“What he means,” said the Doctor, “is this: If you put a quantity of
soluble and available manure on land, and do not sow any crop, the
manure will not be wasted. The soil will retain it. It will change it
from a soluble into a comparatively insoluble form. Had a crop been sown
the first year, the manure would do far more good than it will the next
year, and yet it may be that none of the manure is lost. It is merely
locked up in the soil in such a form as will prevent it from running to
waste. If it was not for this principle, our lands would have been long
ago exhausted of all their available plant-food.”
“I think I understand,” said the Deacon; “but if what you say is true,
it upsets many of our old notions. We have thought it desirable to plow
under manure, in order to prevent the ammonia from escaping. You claim,
I believe, that there is little danger of any loss from spreading manure
on the surface, and I suppose you would have us conclude that we make a
mistake in plowing it under, as the soil renders it insoluble.”
“It depends a good deal,” said I, “on the character of the soil.
A light, sandy soil will not preserve manure like a clay soil. But it is
undoubtedly true that our aim in all cases should be to apply manure in
such a form and to such a crop as will give us the greatest _immediate_
benefit. Plowing under fresh manure every year for wheat is evidently
not the best way to get the greatest benefit from it. But this is not
the place to discuss this matter. Let us look at the result of Mr.
Lawes’ experiments on wheat the third year:”
Experiments at Rothamsted on the Growth of Wheat, Year After Year,
on the Same Land.
Table III.--Manures and Produce; 3rd Season, 1845-6. Manures and Seed
(Old Red Lammas), Sown Autumn, 1845.
Manures
FM Farmyard Manure.
A3W Ash from 3 loads (3,888 lbs.) Wheat-straw.
LWM Liebig’s Wheat-manure.
PG Peruvian Guano.
SPL Superphosphate of Lime.
SiP Silicate of Potass.[1]
P-A Pearl-ash.
S-A Soda-ash.
MLS Magnesian Lime-stone.
B-A Bone-ash.
SAc Sulphuric Acid (Sp. gr. 1-7.)
MAc Muriatic Acid.
SAm Sulphate of Ammonia.
MAm Muriate of Ammonia.
RC Rape-Cake.
-----+--------------------------------------------------------------+
| |
| Manures per Acre. |
P +-----+-----+---+---+-----------+---+---+---+---+------+---+---+
l | | | | | | | | | | | | |
o | | | | | SPL | | | | | | | |
t | | | | +-----------+ | | | | | | |
s | FM | A3W |LWM|PG |SiP|P-A|S-A|MLS|B-A|SAc|MAc| SAm |MAm|RC |
-----+-----+-----+---+---+---+---+---+---+---+---+---+------+---+---+
|Tons.|lbs. |lbs|lbs|bs.|lbs|lbs|lbs|lbs|lbs|lbs|lbs. |lbs|lbs|
0 | .. | .. | ..|336| ..| ..| ..| ..| ..| ..| ..| .. | ..| ..|
1 | .. | .. | ..| ..| ..| ..| ..| ..|224| ..| ..| .. | ..| ..|
2 | 14 | .. | ..| ..| ..| ..| ..| ..| ..| ..| ..| .. | ..| ..|
3 |Unmanured. | ..| ..| ..| ..| ..| ..| ..| ..| ..| .. | ..| ..|
| | | | | | | | | | | | | | |
4 | .. | .. | ..| ..| ..| ..| ..| ..|224| ..|224| 224 | ..| ..|
| | | | | | | | | | | | | | |
5a{1| ..}| |{..| ..| ..| ..| ..| ..| ..| ..| ..| .. | ..| ..|
{2| ..}|Straw|{..| ..| ..| ..| ..| ..| ..| ..| ..|224[1]| ..| ..|
5b{1| ..}| Ash |{..| ..| ..| ..| ..| ..| ..| ..| ..| .. | ..|448|
{2| ..}| |{..| ..| ..| ..| ..| ..| ..| ..| ..|224[1]| ..|448|
6a | .. | .. |448| ..| ..| ..| ..| ..| ..| ..| ..| .. | ..| ..|
6b | .. | .. |448| ..| ..| ..| ..| ..| ..| ..| ..| 112 |112| ..|
7a | .. | .. |448| ..| ..| ..| ..| ..| ..| ..| ..| .. | ..|448|
7b | .. | .. |448| ..| ..| ..| ..| ..| ..| ..| ..| 112 |112|448|
| | | | | | | | | | | | | | |
8a | .. | .. | ..| ..| ..| ..| ..| ..|224| ..| ..| .. | ..|448|
8b | .. | .. | ..| ..| ..| ..| ..| ..|224| ..| ..| 112 |112| ..|
9a | .. | .. | ..| ..| ..| ..| ..| ..| ..| ..| ..| .. | ..|448|
9b | .. | .. | ..| ..| ..| ..| ..| ..| ..| ..| ..| 224 | ..|448|
10a | .. | .. | ..| ..| ..| ..| ..| ..| ..| ..| ..| 224 | ..| ..|
10b |Unmanured. | ..| ..| ..| ..| ..| ..| ..| ..| ..| .. | ..| ..|
| | | | | | | | | | | | | | |
11a | .. | .. | ..| ..| ..| ..| ..| ..|224|224| ..| .. | ..|448|
11b | .. | .. | ..| ..| ..| ..| ..| ..|224|224| ..| 112 |112| ..|
12a | .. | .. | ..| ..| ..| ..|180| ..|224|224| ..| .. | ..|448|
12b | .. | .. | ..| ..| ..| ..|180| ..|224|224| ..| 112 |112| ..|
13a | .. | .. | ..| ..| ..|200| ..| ..|224|224| ..| .. | ..|448|
13b | .. | .. | ..| ..| ..|200| ..| ..|224|224| ..| 112 |112| ..|
14a | .. | .. | ..| ..| ..| ..| ..| 84|224|224| ..| .. | ..|448|
14b | .. | .. | ..| ..| ..| ..| ..| 84|224|224| ..| 112 |112| ..|
| | | | | | | | | | | | | | |
15a | .. | .. | ..| ..| ..| ..| ..| ..|224| ..|224| 224 | ..|448|
15b | .. | .. | ..| ..|224| ..| ..| ..|224| ..|224| 224 | ..|448|
| | | | | | | | | | | | | | |
16a | .. | .. | ..| ..| ..| 67| 60| 84|224|224| ..| .. | ..|448|
16b | .. | .. | ..| ..| ..| 67| 60| 84|224|224| ..| 224 | ..|448|
17a | .. | .. | ..| ..| ..| 67| 60| 84|224|224| ..| 112 | 11|448|
17b | .. | .. | ..| ..| ..| 67| 60| 84|224|224| ..| 224 | ..| ..|
18a | .. | .. | ..| ..| ..| 67| 60| 84|224|224| ..| 112 | 11| ..|
18b | .. | .. | ..| ..| ..| 67| 60| 84|224|224| ..| .. | ..| ..|
| | | | | | | | | | | | | | |
19 | .. | .. | ..| ..| ..| ..| ..| ..|112| ..|112| 112 | ..|448|
20 }| | | | | | | |
21 }| Mixture of the residue of | ..| ..| ..| .. | ..| ..|
22 }| most of the other manures. | | | | | | |
-----+-----+-----+---+---+---+---+---+---+---+---+---+------+---+---+
Produce:
Wt/Bu Weight per Bushel.
OC Offal Corn.
TC Total Corn.
S&C Straw and Chaff.
TP Total Produce (Corn and Straw).
C Corn.
TP Total Produce.
OCD Offal Corn to 100 Dressed.
C100 Corn to 100 Straw.
----------------------------------+------------------+-----+-----+----
| Increase per | | |
Produce per Acre, etc. | Acre by Manure. | | | P
--------------+----+----+----+----+-----+-----+------+ | | l
Dressed Corn.| | | | | | | | | | o
--------+-----+ | | | | | | | | | t
Qty. |Wt/Bu| OC | TC |S&C | TP | C | S&C | TP | OCD |C100 | s
--------+-----+----+----+----+----+-----+-----+------+-----+-----+----
Bu. Pks.|lbs. |lbs.|lbs.|lbs.|lbs.|lbs. |lbs. | lbs. | | |
28 1¾ |62.3 |134 |1906|2561|4467| 699 |1048 | 1747 | 7.3 |74.4 | 0
22 0¾ |62.6 |120 |1509|1953|3462| 302 | 440 | 742 | 8.1 |77.3 | 1
27 0¾ |63.0 |113 |1826|2454|4280| 619 | 941 | 1560 | 6.6 |74.4 | 2
17 3¾ |63.8 | 64 |1207|1513|2720| .. | .. | .. | 7.4 |79.7 | 3
| | | | | | | | | | |
25 3¾ |63.5 |130 |1777|2390|4167| 570 | 877 | 1447 | 7.8 |74.3 | 4
| | | | | | | | | | |
19 0½ |63.7 | 87 |1305|1541|2846| 98 | 28 | 126 | .. |84.6 |1}5a
27 0 |63.0 |126 |1827|2309|4136| 620 | 796 | 1416 | .. |79.1 |2}
23 2½ |63.4 |100 |1598|1721|3319| 391 | 208 | 599 | .. |92.8 |1}5b
30 0¾ |63.3 |165 |2076|2901|4977| 869 |1388 | 2257 | .. |71.6 |2}
20 1½ |63.7 |102 |1400|1676|3076| 193 | 163 | 356 | 7.0 |83.6 | 6a
29 0¾ |63.5 |114 |1967|2571|4538| 760 |1058 | 1818 | 5.3 |76.5 | 6b
22 3¼ |63.0 | 97 |1534|1968|3502| 327 | 405 | 732 | 6.8 |77.9 | 7a
31 3 |63.4 |150 |2163|3007|5170| 956 |1494 | 2450 | 7.5 |72.6 | 7b
| | | | | | | | | | |
22 3¾ |63.5 |101 |1549|1963|3512| 342 | 450 | 792 | 7.1 |78.9 | 8a
29 0¾ |63.6 |132 |1988|2575|4563| 781 |1062 | 1843 | 7.2 |77.2 | 8b
23 2¾ |63.0 |122 |1614|2033|3647| 407 | 520 | 927 | 7.9 |79.4 | 9a
28 3½ |63.3 |114 |1942|2603|4545| 735 |1090 | 1825 | 7.0 |74.6 | 9b
27 1½ |63.6 |109 |1850|2244|4094 643 | 731 | 1374 | 6.4 |82.4 | 10a
17 2½ |63.8 | 92 |1216|1455|2671| 9 | -58 | -49 | 7.8 |83.6 | 10b
| | | | | | | | | | |
23 1¾ |63.3 |145 |1628|2133|3761| 421 | 620 | 1041 | 9.8 |76.3 | 11a
30 0¼ |63.2 |155 |2055|2715|4770| 848 |1202 | 2050 | 6.1 |75.7 | 11b
24 1½ |63.0 |125 |1661|2163|3824| 454 | 650 | 1104 | 7.9 |76.8 | 12a
28 2¾ |63.4 |136 |1955|2554|4509| 748 |1041 | 1789 | 7.4 |76.5 | 12b
24 0 |63.5 |136 |1660|2327|3987| 453 | 814 | 1267 | 9.1 |71.3 | 13a
29 1¾ |63.2 |138 |1998|2755|4753| 791 |1242 | 2033 | 7.3 |72.5 | 13b
23 2½ |63.0 |117 |1605|2031|3636| 398 | 518 | 916 | 7.7 |79.0 | 14a
26 2½ |63.4 |124 |1812|2534|4356| 605 |1021 | 1626 | 7.4 |71.5 | 14b
| | | | | | | | | | |
31 1¾ |62.5 |147 |2112|2936|5048| 905 |1423 | 2328 | 7.5 |71.9 | 15a
27 2¾ |63.0 |117 |1861|2513|4374| 654 |1000 | 1654 | 5.9 |74.0 | 15b
| | | | | | | | | | |
23 3 |62.5 |108 |1592|2967|3659| 385 | 554 | 939 | 7.0 |77.0 | 16a
30 1 |62.7 |122 |2019|2836|4855| 812 |1323 | 2135 | 6.6 |71.2 | 16b
33 2¾ |62.8 |129 |2241|3278|5519|1034 |1765 | 2799 | 5.8 |68.3 | 17a
30 2 |63.0 |113 |2034|2784|4818| 827 |1271 | 2098 | 5.9 |73.0 | 17b
31 0 |62.8 |103 |2048|2838|4886| 841 |1325 | 2166 | 5.1 |72.2 | 18a
21 1 |62.0 |157 |1474|1893|3367| 267 | 380 | 647 | 6.6 |77.1 | 18b
| | | | | | | | | | |
28 3 |62.0 |107 |1889|2425|4314| 682 | 912 | 1594 | 5.8 |77.9 | 19
| | | | | | | | | | |{20
.. .. | .. | .. | .. | .. | .. | .. | .. | .. | .. | .. |{21
| | | | | | | | | | |{22
--------+-----+----+----+----+----+-----+-----+------+-----+-----+----
[Note 1: Top-dressed in the Spring.]
This year, the seed and manures were sown in the autumn. And I want the
Deacon to look at plot 0. 3 cwt. of Peruvian guano here gives an
increase of 10½ bushels of wheat, and 1,948 lbs. of straw per acre. This
will pay _well_, even on the wheat alone. But in addition to this, we
may expect, in our ordinary rotation of crops, a far better crop of
clover where the guano was used.
In regard to some of the results this year, Messrs. Lawes and Gilbert
have the following concise and interesting remarks:
“At this third experimental harvest, we have on the continuously
unmanured plot, namely, No. 3, not quite 18 bushels of dressed corn, as
the normal produce of the season; and by its side we have on plot
10_b_--comprising one-half of the plot 10 of the previous years, and so
highly manured by ammoniacal salts in 1845, but now unmanured--rather
more than 17½ bushels. The near approach, again, to identity of result
from the two unmanured plots, at once gives confidence in the accuracy
SOURCES & PROVENANCE
1 listed
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PUBLIC-DOMAIN BOOK
Talks on Manures A Series of Familiar and Practical Talks Between the Author and the Deacon, the Doctor, and Other Neighbors, on the Whole Subject
primary
Full text in the local archive
Bibliographic record from the archive catalogue.