Levels of Biochar and NPS Fertilizer Rates on Growth, Yield Component, and Yield of Maize (Zea mays L.) at Guto Gida, Western Ethiopia
Table 7
Partial budget analysis of maize yield for the determination of economically profitable level of biochar and NPS fertilizer rate
Treatment
Biochar (t·ha−1)
NPS (kg·ha−1)
Grain yield (t·ha−1)
Adjusted grain yield (t·ha−1)
Gross benefit (ETB ha−1)
TVC (ETB ha−1)
Net benefit (ETB·ha−1)
MRR (%)
T1
0
0
5.96
5.36
53613
0.00
53613.00
—
T2
0
50
6.02
5.43
54270
712.50
53557.50
D
T3
0
100
6.46
5.82
58167
1425.00
56742.00
446.95
T4
2
0
6.22
5.60
56007
50.00
55957.00
—
T5
2
50
6.32
5.69
56880
762.50
56117.50
22.53
T6
2
100
6.91
6.22
62163
1475.00
60688.00
641.47
T7
4
0
6.29
5.66
56583
100.00
56483.00
—
T8
4
50
6.54
5.89
58887
812.50
58074.50
223.37
T9
4
100
6.95
6.25
62523
1525.00
60998.00
410.32
T10
6
0
6.30
5.67
56700
150.00
56550.00
—
T11
6
50
6.75
6.07
60723
862.50
59860.50
464.63
T12
6
100
6.97
6.28
62757
1575.00
61182.00
185.47
T13
8
0
6.30
5.67
56673
200.00
56473.00
—
T14
8
50
6.96
6.26
62613
912.50
61700.50
733.68
T15
8
100
7.03
6.33
63270
1625.00
61645.00
D
Application cost of biochar and mineral NPS fertilizer = 0.25 ETB·kg−1, unit cost of NPS fertilizer = 15 ETB·kg−1 = ETB = Ethiopian birr, NPS = fertilizer containing 19% N, 38% P2O5 and 7% S, TVC = total variable cost, MRR = marginal rate of return, D = dominated.
