51

o

K ^

Suff'^ LAWES AGRICULTURAL TRUST.

BioIo|:ical
Sehah

Rotkamsted Experimental Station,
Harpenden.

Annual Supplement

TO

"Guide to tke 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
manurmg, &c., there described.

A. D. HALL,

Director.

ST. .ALBANS :

PRINTED BV \\. C.^RTMEL AND SONS, VICTORIA STREET.

1907.

Subscribers & Donors to the Rothamsted

Experijfi en ta I Sia tio n,

igo^ mid since.

The Goldsmiths' Company (Endowment for Soil Investigatioit).

J. F. Mason, Esq., M.P. (The James Mason Laboratoey).

The Permanent Nitrate Committee.

The Fertiliser Manufacturers' Association.

The Potash Syndicate.

The Clothworkeks' Company.

A. D. AcLAND, Esq.

The Right Hon. Lord Avebury, F.R.S.

Sir James Blyth, Bart.

E. HiLDRED Carlile, Esq., M.P.

W. T. Coles, Esq.

Sir R. p. Cooper, Bart.

H. Shepherd Cross, Esq.

Messrs. Ellis and Everard.

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

Sir Walter Gilbey, Bart.

Eustace Gurney, Esq.

H. Tylston Hodgson, Esq.

A. B. Holinsworth, Esq.
W. B. Keen, Esq.

Sir Charles Lawes-Wittewronge, Baut.

De. Hugo Muller, F.H.S.

Henry S. Nunn, Esq.

Marlborough R. Pryor, Esq.

William Ransom, Esq.

The Right Hon. Lord Rothschild.

B. S. RowNTREE, Esq.
Frederick Seeboum, Esq.
B. Stanier, Esq.

Dr. J. Augustus Voelcker, M.A.

The Right Hon. Loud Walsingham, F.R.S.

W. R. Woolkych, Esq.

RAINFALL AND DRAINAGE, 1906.
{Pa^e 16, Table IX.)

Bain.

Drainage.

Temperature.

No. of

Total Fall.

Bainy
Days.

Bright
Sun-

Soil
20 ins.

Soil
40 ins.

Soil
60 ins.

shine.

Max.

Min.

5-inch

-nnsoth

T^t^l

deep.

deep.

deep.

Funnel

Acre

Acre

Gauge.

Gauge.

Gauge.

Inches.

Inches.

Inches.

No.

Inches.

Inches.

Hours.

°F.

°F.

January

4-038

4093

22

3-380

3-607

3-5-25

74-9

46-7

35-3

February

2-282

2-330

18

1-476

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-C

33-7

Apiil

0-739

0-795

7

0016

0-045

0-076

226-1

55-5

33-5

May

1-333

1-377

16

0-005

0-015

0043

151-2

60-1

43-5

June

3-422

3-606

10

l-6'23

1-571

1-578

239-9

66-6

46-7

July

. 0-383

0-419

7

0-009

0-053

0-056

271-8

71-6

51-5

August

. 1-171

1-245

10

0-002

0-005

0003

253-4

73-3

52-6

September

. 1-065

1-146

12

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

2-325

2-343

2-319

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.

0.

N.

A.

AC.

C.

Tons.

Tons.

Tons.

Tons.

Tons.

1

C
t

E. 20 39

L. 414

30-31

5-76

25 69

4-90

26-82

5-22

25 26

4-43

2

(

E. 20-94

L. 3-47

30-24

5-42

3095

6-18

32 06

6-88

3010

5-12

4

<

B. 5-51
L. 1-39

( 13-98

1 16-62
J 4-31
t 5-01

}
\

12-29

3-85

26-31

5-09

23 18

3-04

5

{

E. 5-91
L. 1-33

14-30

3-70

3-85

216

657

2-31

893

2-30

6

\

E. 5-31

L. 1-21

17-23

3-64

1638

3-52

25-28

5-49

21-66

2-98

7

{

B. 5-«

L. 1-42

2192

3-98

1695

2-94

28 19

5 13

24-68

3-39

8

{

B. 3-67

L. 113

10-25

3-74

636
306

805

2-58

9-93
2-43

HAY. THE PARK GRASS PLOTS.
{Page 19, Table XL)

FIRST CROP.

Plot.

3
12

2

1

4-1

8

7

6
15

5
17
4-2
10

9
13
11-1
11-2
16
14

11-1
11-2
14

SECOND CROP.

Produce of Hay per Acre.
Cwt.
12-0
15.3
15-7
18-7
14-4
20-4
37-9
29-6
34-3
10-9
28-8
25-5
30-7
44-5
17-4
47-3
63-6
38-9
440

3-4
4-2
1-8

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

FIRST CROP.

Plot.

Graminese.

LeguminoseB.

MiscellaneDB.

Per cent.

Per cent.

Per cent.

3

45-6

8-d

4C-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

16

50-4

24-4

25-2

WHEAT. BEOADBALK FIELD.
{Page 26, Table XIV.)

Plot.

Dressed Grain.

Straw.

i

i

Weight

Yield.

per Bushel.

Bushels.

lbs.

Cwt.

2

43-6

64-2

38-5

3

1.5-2

630

10-2

5

171

63-4

12-.5

6

27-7

64-2

22 -7

7

37-7

6-5-0

32-4

8

47-5

64-8

420

9

32-9

63-9

26-9

10

22-8

631

16-6

11

22-8

62-5

17-7

12

29-8

63-5

24-1

13

40-9

64-9

360

U

30-6

64-0

25-1

15

42-2

6.51

360

16

431

64-2

38-5

17^

•43-5

640

34-4

181

t29-5

63-2

21-8

19

36-8

64-4

29-6

• Produce by Ammonium Salts. t Produce by Minerals.

BARLEY. HOOS FIELD.
{Page 33, Tabh XVL)

Plot.

Dressed Grain.

Straw.

Weight

Yield.

per Bushel.

Bushels.

lbs.

Cwt.

1 0

110 54-9

6-6

2 0

18-7

56-6

8-2

3 0

14-5

56-0

7-9

4 0

201

570

11-4

1 A

24-7

56-4

14-2

2 A

41-5

570

21-4

3 A

281

57-6

18-4

4 A

.521

59-3

26-5

1 N

301

56-8

16-9

2 N

500

58-8

29-0

3 N

31-0

57-7

19-4

4 N

49-2

59-3

261

1 C

41-6

58-6

21-6

2 C

42-8

59-1

22-9

3 C

39-8

591

22-3

4 C

46-6

59-2

25 0

7-1

22-4

57-3

12-8

7-2

54-8

590

33-6

BAKLEY. HOOS FIELD.
{Page 40, Tahle XIX.)

Plot.

Dressed Grain.

Straw.

Total
Produce.

Yield.

Weight
per Bushel.

Bushels.

lbs.

Cwt.

lbs.

1

9-2

57-0

5-5

1175

2

17-0

57-5

9-8

2116

3

360

58-5

21-1

4563

4

40-5

58-5

24-8

5226

WHEAT AFTER FALLOW.
HOOS FIELD.

{Faffe 41, Table XX.)

Dressed Grain

Straw

Total Produce

YIELD PER ACRE.
( Yield— 18-4 bushels.
( Weight per bushel — 63-4 lbs.

12-8 cwt.

2340 lbs.

INOCULATION OF LEGUMINOUS PLANTS.
HOOS FIELD.

{Page 40 and plan page 37).

PRODUCE OF RED CLO^^ER (HAY) IN 1906.

1. EFFECT OF INOCULATING THE SOIL.

Plot.

Soil inoculated with —

Mean of Plots

6, 8, and 10.

1st and 2nd Crops.

A ...

B ...
C ...

D ...

Hiltner's Preparation from Munich

Moore's Preparation from the United States ...

Soil from a field which had carried Bed Clover
in 1904

Left uninoculated

Cwt.
76-4

72-9

68-4
61-9

2. EFFECT OF PAST MANURING.

Plot.

Mean of Plots,

A, B, C, D.

1st and 2nd Crops.

6
8

10

Nitrate of Soda 1876-1901, since unmanured

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

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

Cwt
611

79-5

690

3. DETAILS OF THE ABOVE.

Plot.

1st Crop.

2nd Crop.

Total.

Cwt.

Cwt.

Cwt.

6 A

31-8

330

64-8

6B

36-5

37-5

740

6G

28-8

28-5

57-3

6 D

25-8

22-5

48-3

8 A

61-4

37-5

88-9

8 B

48-4

34-5

82-9

8C

43-9

300

73-9

8D

40-9

31-5

72-4

10 A

43-9

31-5

75-4

10 B

39-4

22-5

61-9

10 C

42-4

31-5

73-9

10 D

37-9

270

64-9