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Biologtcal
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LAWES AGRICULTURAL TRUST.

Rothamsted Experimental Station,
Harpenden.

ANNUAL SUPPLEMENT

TO

“Guide to the Experimental
Plots, 1906,”

CONTAINING THE YIELDS PER ACRE FOR 1906.

In every case the page, table, and plot numbers refer to the
‘Guide,’ it being understood that no change is made in the
manuring, &c., there described.

A. D. HALL,

Director.

Si,, ALBANS:

PRINTED BY W. CARTMEL AND SONS, VICTORIA STREET.

| 1907.

Subscribers & Donors to the Rothamsted
Experimental Station,

IQO4 and since.

Tur Goipsurras’ Company (Enpowmentr For Som Invesrie@ation).
J. F. Mason, Ese., M.P. (Tae James Mason Lasoratory).
Tae Permanent Nitrate ComMItree.

Tue Ferrintserk Manuracturers’ Association.
Tue Porasn SynpIcare.

Tae Croruworkers’ Company,

A. D. Actann, Esa.

Tur Rieut Hon. Lorn Avesury, F.R.S.
Sir James Bryra, Barr.

E. Hitprep Carte, Ese., M.P.

W. T. Corrs, Ese.

Str R. P. Cooper, Barr.

H. Surepuerp Cross, Esa.

Messrs. Extis anp EvErarp.

Sir Jonn Evans, K.C.B., F.R.S.

Str Watrer Giipey, Barr.

Eustace Gurney, Ese.

H. Tytsron Hopneson, Ese.

A. B. Horttnsworrn, Ese.

W. B. Keen, Esa.

Str Coartes Lawes-Wrrrewroner, Barr.
Dr. Hueco Miter, F.R.S.

Henry S. Nunn, Ese.

MartsoroucH R, Pryor, Esa.

Wintram Ransom, Ese.

Tae Riear Hon. Lorp RoruscHirp.

B. S. Rownrrer, Esa.

Frepertck Sresoum, Hse.

B. Sranier, Esa.

Dr. J. Aveustus Voricker, M.A.

Tue Rieur Hon. Lorp Watstnenam, F.R.S.
W. R. Wootryca, Esa.

3

RAINFALL AND DRAINAGE, 1906.
(Page 16, Table IX.)

Rain. Drainage. Temperature.
No. of
Total Fall. | Rainy Bright
Days Sun-
Soil Soil Soil § shine.
29 ins. | 40 ins. | 60 ins. Max. | Min.
5-inch | ;>5oth|z)55th | deep. | deep. | deep.
Funnel} Acre Acre
Gauge. | Gauge. | Gauge.
Inches.| Inches.| No. {Inches.| Inches.| Inches.}Hours.} °F. OD
January ... 4-038 | 4-093 22 3°380 | 3°607 | 3°525 74:9 | 46-7 | 35:3
February 2°282 | 2-330 18 L:A76 | 1-575 | 1-551 84:9 § 43°3 | 31:5
March 1:544 | 1°635 18 0°421 | 0°539 | 0°526 | 122-6 | 47°6 | 33:7
April 0°739 | 0:795 a 0:016 | 0-045 | 0-076 | 226-1 | 55°5 | 33°5
May 1:333 | 1:377 16 0:005 | 0-015 | 0:043 | 151-2 | 60:1 | 43°5
June 3°422 | 3:606 10 1:623 | 1°571 | 1:578 | 239-9 | 66°6 | 46-7
July... 0°383 | 0-419 us 0:009 | 0:053 | 0:056 } 271-8 | 71:6 | 51-5
August on7al |) Teas 10 0:002 | 0:005 | 0-003 | 253-4 | 73°3 | 52°6
September 1:065 | 1-146 12 Sa He ome 206-1 | 67:3 | 47:2
October ... 5:160 | 5-297 20 3°033 | 2-914 | 2-858 95°8 | 58°8 | 45:7
November 4-081 | 4-217 17 3°660 | 3-811 | 3:721 46:2 | 50°5 | 39°4
December 2°795 | 2-789 18 Up y sy || Deay Bi) Breil) 59:9 | 40°8 | 31:3
Total or Mean |28°013 |28:949 | 175 |15-950 | 16-478 | 16-256 }1832°8 | 56°8 | 41-0
MANGEL WURZEL. BARN FIELD.
(Page 11, Table VI.)
|
Strip. O. N. A. AC. C.
Tons Tons Tons Tons. Tons
1 R. 20°39 30°31 25°69 26°82 25°26
Ibp, Ziel 5°76 4:90 5°22 4°43
9 { R. 20°94 30°24 30°95 32:06 30°10
li, Bee) 5°42 6°18 6°88 9°12
( BR. 5-54 { tee 42-29 26°31 23:18
4 Zi
4-31 -Or ; 2.0.
lL. 1:39 { ie ‘ 3°85 5-09 3-04
5 R. 5°94 14°30 3°85 6:57 8:93
Ee 1633 3°70 2°16 231 2°30
6 Cen Sra 17:23 16°38 25°28 21°66
heal 1-21 3°64 3°52 5:49 2-98
7 R. 5:44 21:92 16°95 28°19 24-68
i 142 3°98 2-94 pele 3°39
8 R. 3:67 10°25 6°36 8:05 9:93
1h, aleale? 3°74 3°06 2°58 2°43

HAY. THE PARK GRASS PLOTS.
(Page 19, Table XI.)

FIRST CROP.

Plot. Produce of Hay per Acre.
Cwt.
3 12:0

12 Ra ov: Be fo: sac nee 15.3
2 ea Ass ve +: i. MOL 15:7
1 abe 36 5 Ac 58 ane 18°7
Al sc. Bae oa ee oud 55 14:4

8 sia as ay ae ae Bate 20°4

6 aa “fc oie aoc soe She 29°6

5 34°3
5 10°9
17 64 “0 ae sat Sis es 28°8
CE see oes owe ai Ee 4E- 25:5
10 aie ee a0¢ ac 0 of 30°7
9 toe 368 ae =e Soc 20% 44°5
13 oo eee ae noc Se Li 17:4

(EI Cos soc ote ode on ae 47°3

THIER Soe 50 ae mee soc 306 63°6
16 eas oe ay aes ed ee 38°9

14 x50 sci Sa = sac 502 44°0

SECOND CROP.

11-1 3°4
11-2 4:2
14 1:8

BOTANICAL COMPOSITION, PER CENT.
(Page 20, Table XII.)

FIRST CROP.
Plot. Graminee. Leguminose. Miscellanee.
Per cent. Per cent. Per cent.
3 45°6 8:3 46°1
4-1 39°8 11:9 48:3
8 34:8 12:5 52°7
7 48:3 21:7 30:0
6 41-0 30°3 28:7
15 50°4 24:4 25:2

WHEAT.

Plot.

* Produce by Ammonium Salts.

5

Dressed Grain.

22°8

*
He He He CO He bo bo

tw bo
SOwHSSSSY
WD Or Orr DO OD DO

coin

BARLEY.
(Page 38, Table XVI.)

Weight
per Bushel.

lbs.
64:2
63-0
63°4
64:2
65:0
64:8
63°9
63-1
62°5
63°5
64-9
64:0
65°1
64-2
64:0
63°2
64-4

BROADBALK FIELD.
(Page 26, Table XIV.)

Straw.

wWNWwWwWNH WHE HD Rw LO
DH RDANORIARDSYNWW
DORMOHOCOHAIROSOR A?

¢ Produce by Minerals.

HOOS FIELD.

Dressed Grain.

Plot.
Yield
Bushels

10 11:0
O19) 18°7
370 14°5
40 20°71
TA 24°7
Dy TN 41°5
By 28°1
4A Boll
1N 30°71
2N 50:0
3 N 31-0
4N 49-2
1C 41:6
2C 42°8
3 C 39°8
4C 46°6
7-1 22-4
7-2 54°8

Straw.
Weight
per Bushel.

lbs. Cwt.
54:9 6°6
56°6 8:2
56-0 us,
57°0 11:4
56°4 14:2
57:0 21-4
57°6 18:4
59°3 26°5
56°8 16:9
58°8 29°9
577 19°4
59°3 26:1
58°6 21°6
59-1 22°9
59°1 22°3
59°2 25°0
57°3 12°8
59°0 33°6

BARLEY. HOOS FIELD.

(Page 40, Table XIX.)

Dressed Grain.
Plot. Straw.
Weight
Yield. per Bushel.

Bushels. Ibs. Cwt.

1 9-2 57:0 55

2 17:0 57°5 9°8

3 36:0 58°5 21-1

4 40°5 58°5 24°8

WHEAT AFTER FALLOW.

HOOS FIELD.
(Page 41, Table XX.)

Total
Produce.

lbs.

1175
2116
4563
5226

Dressed Grain

Straw

Total Produce

YIELD PER ACRE.
§ Yield—13°4 bushels.

( Weight per bushel—63°4 lbs.

12°8 cwt.

2340 lbs.

Plot.

Plot.

10

7

INOCULATION OF LEGUMINOUS PLANTS.

HOOS FIELD.

(Page 40 and plan page 37).

PRODUCE OF RED CLOVER (HAY) IN 1906.

14. EFFECT OF INOCULATING THE SOIL.

Soil inoculated with—

Hiltner’s Preparation from Munich

Moore’s Preparation from the United States

in 1904 .

Left uninoculated ...

Soil from a field which had carried Red Clover

Mean of Plots
6, 8, and 10.
1st and 2nd Crops.

Cwt.
76°4

72°9

68-4
61°9

2. EFFECT OF PAST MANURING.

Mean of Plots,
AY BCD:
1st and 2nd Crops.

Cwt.

Nitrate of Soda 1876-1901, since unmanured 61:1
Nitrate of Soda and Mixed Minerals 1876-1901,

since unmanured ; 79°5

Mixed Minerals only 1876-1901, since unmanured... 69-0

3. DETAILS OF THE ABOVE.

Plot. 1st Crop. 2nd Crop.
Cwt. Cwt.
6A 31°8 33°0
6B 36°5 37°5
6 C 28°8 28°5
6D 25°'8 22°5
SA §1°4 37°5
8B 48-4 34°5
8 C 43°9 30:0
8D 40-9 31°5
10 A 43°9 31°5
10 B 39-4 Bary
10 C 42-4 S155
10 D 37:9 27:0

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