Physical properties |
Content |
Rating |
Soil texture: |
|
|
Sand (%) |
28 |
|
Silt (%) |
49 |
|
Clay (%) |
22 |
|
Textural class |
|
Silt loam |
Chemical properties |
|
|
pH (1:2.5 H2O) |
6.3 |
Slightly acidic |
Organic carbon (%) |
1.86 |
Low |
TN (%) |
0.157 |
Low |
Available P (mg/kg) |
2.2 |
Very low |
CEC Cmol kg-1) of soil |
22.56 |
Medium |
CEC=Cation exchange capacity, TN=Total nitrogen
Table 1 : Soil properties of the experimental site
N (kg ha-1) |
DH |
GFP |
TKW(g) |
AGB |
||
0 |
63.00d |
29.67c |
45.17c |
15567b |
||
23 |
64.00c |
30.67b |
45.62c |
16585a |
||
46 |
65.44b |
30.56 |
47.30b |
16822a |
||
69 |
67.22b |
30.78b |
48.53ab |
16728a |
||
92 |
70.22a |
33.33a |
49.93a |
16855a |
||
LSD (0.05) |
1.301 |
2.065 |
1.529 |
719.1 |
||
P (kg ) |
|
|
|
|
||
100 |
65.58b |
29.17c |
45.65b 16130b |
|
||
150 |
66.25b |
31.50b |
46.75a 16275b |
|
||
200 |
68.33a |
33.33a |
47.77a 17129a |
|
||
LSD (0.05) |
1.126 |
1.788 |
1.184 557.0 |
|
||
|
||||||
N= nitrogen; P = phosphorus; DH=Days to 50% heading; GFP= Grain filling period; TKW=Thousand kernels weight; AGB=Above ground biomass; CV= coefficient of variance; LSD= Least Significant Difference at 5% level.
Table 2: Main Effect of N and P on some parameter of bread wheat
N (kg ha-1) |
P (kg ha-1) |
|
|
|||
90% PM PH |
|
|
||||
100 |
150 |
200 |
100 |
150 |
200 |
|
0 |
86.33i |
91.33hi |
90.33gh |
74.87j |
83.60h |
81.07i |
23 |
88.00g |
95.67cdef |
96.67bcde |
84.52hg |
85.23gh |
92.40d |
46 |
94.00f |
95.33def |
98.00bc |
86.63fg |
89.53e |
97.17c |
69 |
95.00ef |
97.67bcd |
98.33b |
88.23ef |
94.67cd |
102.50b |
92 |
95.67cdef |
99.00b |
101.33a |
92.53d |
96.60c |
106.27a |
Treated mean |
|
95.58 A |
|
|
90.39A |
|
Control mean |
|
89.33B |
|
|
63.53B |
|
N × P LSD (0.05) 1.458 |
|
Treated ×Control 1.339 |
|
N×P LSD (0.05) 2.455 |
Treated ×Control 16.4 |
|
CV (%) 0.9 |
|
0.4 |
|
CV (%) 1.6 |
6.1 |
|
N= nitrogen; P = phosphorus; PM= Physiological maturity; PH= Plant height; CV= coefficient of variance; LSD= Least Significant Difference
at5% level
Table 3: The Interaction Effect of nitrogen with phosphorus on days to 90%physiological maturity and plant height of bread wheat
N (kg ha-1) |
P (kg ha-1) |
|
|
||||||||||||
TNT |
PNT |
||||||||||||||
100 |
150 |
200 |
100 |
150 |
200 |
||||||||||
0 |
4316667g |
4166667g |
6300000bcd |
3666667g |
3986000fg |
5961333bc |
|||||||||
23 |
4533333fg |
5700000cde |
5083333efg |
4368667efg |
5435833bcd |
4880000def |
|||||||||
46 |
5450000def |
5650000de |
6400000bcd |
5138333cde |
5388833cde |
6082333bc |
|||||||||
69 |
5433333def |
6000000bcde |
6816667ab |
5180333cde |
5718667bcd |
6432333ab |
|||||||||
92 |
5633333de |
6766667abc |
7600000a |
5331667cde |
6449333ab |
7105000a |
|||||||||
Treated mean |
|
5757778A |
|
|
5478311A |
|
|||||||||
Control mean |
|
3316667B |
|
|
2466667B |
|
|||||||||
N×P |
|
Treated ×Control 2174158 |
|
N×P LSD (0.05) 926598.7 |
Treated ×Control 1638732.5 |
|
|||||||||
CV (%) 10.1 |
|
12.3 |
|
CV (%) 10.2 |
12.3 |
|
|||||||||
N= nitrogen; P = phosphorus; TNT= Total number of tillers; PNT= Productive number of tillers; CV= coefficient of variance; LSD= Least Significant Difference at5% level
Table 4: The Interaction Effect of nitrogen with phosphorusfertilizers on total number of tillers and productive number of tillers of bread wheat
N (kg ha-1) |
P (kg ha-1) |
|
|
|||||||||||
GY(kg ha-1) |
HI (%) |
|||||||||||||
100 |
150 |
200 |
100 |
150 |
200 |
|||||||||
0 |
4050e |
5172cd |
5232bcd |
0.284c |
0.323bc |
0.319bc |
||||||||
23 |
4581de |
5533bc |
5288bcd |
0.283c |
0.335bc |
0.318bc |
||||||||
46 |
5180cd |
5199bcd |
6810a |
0.316bc |
0.321bc |
0.377ab |
||||||||
69 |
5290bcd |
5506bc |
5983b |
0.319bc |
0.333bc |
0.349ab |
||||||||
92 |
5396bc |
5453bc |
6832a |
0.324bc |
0.325bc |
0.400 a |
||||||||
Treated mean |
|
5417A |
|
|
0.33A |
|
||||||||
Control mean |
|
2093B |
|
|
0.28B |
|
||||||||
N×P LSD (0.05) 683.1 |
|
Treated ×Control 1347.5 |
|
N×P LSD (0.05) 0.034 |
Treated ×Control 0.043 |
|
||||||||
CV (%) 7.5 |
|
8.4 |
|
CV (%) 6.3 |
4.0 |
|
||||||||
N= nitrogen; P = phosphorus; GY= Grain yield; HI= Harvest index; CV= coefficient of variance; LSD= Least Significant Difference at 5% level.
Table 5: The Interaction Effect of Effect of nitrogen with phosphorus fertilizers on grain yield and harvest index of bread wheat
P |
N |
Average |
Adjusted Yield |
GB |
TVC |
NB |
MRR (%) |
0 |
0 |
2093 |
1883.7 |
11302.2 |
0 |
11302.2 |
0 |
100 |
0 |
4050 |
3645 |
21870 |
1822 |
20048 |
480 |
100 |
23 |
4581 |
4122.9 |
24737.4 |
2415.5 |
22321.9 |
383.13 |
100 |
46 |
5180 |
4662 |
27972 |
3009 |
24963 |
445 |
100 |
69 |
5290 |
4761 |
28566 |
3602.5 |
24963.5 |
0.084 |
100 |
92 |
5396 |
4856.4 |
29138.4 |
4196 |
24942.4 |
D |
150 |
0 |
5172 |
4654.8 |
27928.8 |
2608 |
25320.8 |
D |
150 |
23 |
5533 |
4979.7 |
29878.2 |
3201.5 |
26676.7 |
228.45 |
150 |
46 |
5199 |
4679.1 |
28074.6 |
3795 |
24279.6 |
D |
150 |
69 |
5506 |
4955.4 |
29732.4 |
4388.5 |
25343.9 |
179.32 |
150 |
92 |
5453 |
4907.7 |
29446.2 |
4982 |
24464.2 |
D |
200 |
0 |
5232 |
4708.8 |
28252.8 |
3394 |
24858.8 |
D |
200 |
23 |
5288 |
4759.2 |
28555.2 |
3987.5 |
24567.7 |
D |
200 |
46 |
6810 |
6129 |
36774 |
4581 |
32193 |
1284.8 |
200 |
69 |
5983 |
5384.7 |
32308.2 |
5174.5 |
27133.7 |
D |
200 |
92 |
6832 |
6148.8 |
36892.8 |
5768 |
31124.8 |
672.46 |
P = phosphorus; N= nitrogen; ETB= Ethiopian Birr; GB= Gross benefit; TVC = Total variable cost; NB = Net benefit; D=Dominated treatment's, MRR = Marginal rate of return.
Table 6: Marginal analysis of bread wheat yield as influenced by N with P fertilizer rates
Tables at a glance