General exploratory experiments
Page 362
These experiments were intended to test the response of groundnuts to N, PO, KO and CaO, and the effect of the placement drilling of N and P2O.... The design adopted was a 23 factorial, the drilling treatment being treated as a separate factor. Since drilling was not, in fact, combined with two of the four remaining factors a number of dummy contrasts are introduced into the design, which complicates analysis and presentation. The levels of application of plant foods were :-
Nitrogen: Nil and 0.1 cwt. Phosphate: Nil and 0.5 cwt. Potassium: Nil and 0.6 cwt. Lime:
N per acre as sulphate of ammonia. P2Os per acre as superphosphate. K2O per acre as muriate of potash.
Nil and 8 cwt. per acre of ground limestone from Sagara, Kongwa district.
All K and CaO and half the N and P.O, applications were broadcast by hand. The remainder of the N and P2O, applications were applied through a standard placement drill. Plot size was 4 rows (1 drill width) x 114 links or 0.016 acre. The results of the experiments at Kongwa are shown in the following tables:
Table 7.-General Exploratory Experiments, Groundnuts, Kongwa Area, 1947-48. Summary of Results
Kernels, lbs. per acre.
1. General.
Experiment No.
5
11
12
22
34
7a
16
27
Mean
Variety
Val.
Val.
Val.
Val.
Val.
Sp.
Sp.
Sp.
Plant number (000)
acre)
30.6
13.3
28.6
20.9
11:9
10.0
7.7
14.5
Standard
error Fer
plot as per cent.
of mean
10.6
9.5
10.5
11.0
26.2
14.4
32.6
19.6
956
812
[1,129
783
378
712
519
800
761.
Mean yield
II. Main effects and inter-
actions.
Main effects N
Ir.teractions NP
NK
PK
NL
ZAKL
PL
KL
ཝཆྩོཝནྣཾ ལྷོགགཡགྒ
ཀིཙྪིཝིཏྭཱ &ཧཐཝརཱསྶ
130†
85*
62 142+ —12
8
-16
19
-94
-60
31
-78
-28
28
-18
-32
197
-36
19
-36
-30
-8.
47
—ཧཋསྶ །ཡངྒཱཧགོམ
6
86
78
32
-8
-23 -38
-11
-50
39
-72
ག⌘ཝསྶ ཚསྶསྶཱཧཝསྶ
-33
13
86
95
-57
24
10
Swu
3
10
-84
-111
27
-70
2
15
45
-56
75
-135*
20
..94
977977
-19
-18
-4
-27
-18
of
35.7
27.2
41.8
...
30.4
35.1
36.2
59.9
55.3
Standard errors
main effects and interactions
III. Main effects and in-
teractions on broad-
cast and placed plots.
Broadcast plots N
46
33
46
100*
P
169+
65
194†
-52
NP
121*
97*
-60
6
442
-36 29
26
-151
8
73
68
72
-35
-92
-98
Flaced plots N
110
-37
84
-82
-35
-46
P
286+
195†
90
88*
43
140*
NP
152†
~24
-94
-76
-11
18
༤༩
-32
86
17
0
104
118
-78
-124
-30
Standard
errors. of
cffects on
broad-
cast and
placed
plots
55.0
38.4
59.2
43.0
49.6
51.2
84.7
78.2
IV. Increase
of effects
through drilling.
64
-70
38
--182†
P
117
130* -104
140*
-3399
82
19
111
-58 ---73
237 36
46
རེཕ་
Standard
errors of
increases ÷
71.3
54.3
83.7
60.9
70.2
72.5
119.8 110.6
V. Soil data.
Red
Upland
Grey
Upland brown
Soil type pH
Red
Red
Red pallia valley
Red
pallid valley
6.5
6.0
6.6
7.0
7.4
6.2
1.5
7.2
Ca mgm./100 gm.
25
25
80
122
248
50
75
162
P
0.11
0.18
0.18
1.28
0.15
0.31
0.61
0.28
"
K
12
2
12
8
2
10
4
4
*Effects dragizo2nafikk97arise by chance in more than I in 20case 362 of 1097
"
""
""
"
128
1 in 100 cases.
JP