After on-farm verification trial, which is in-built in STCR project, through large number of Frontline Demonstrations (FLDs), STCR technology has been also evaluated in farmers’ field. As an example, the economic gain from different yield targets of Tamil Nadu is given below:
Economic analysis and benefit: cost ratios of fertilizer doses for different yield targets
| Crop | Yield target and Treatments | Fertilizer
Doses (kg/ha) N P2O5 K2O |
Yield
(t/ha) |
Fertilizer
Cost Rs./ha |
BCR | ||
| 1. Rice – Flooded
(TNAU Farm, Coimbatore) |
6 t ha-1NPK fertilizer
7 t ha-1NPK fertilizer 7 t ha-1IPNS package* |
137
172 118 |
56
56 36 |
23
23 23 |
6.01
6.94 7.11
|
4922
5286 3746 |
1.52
1.74 1.75 |
| 2. Rice – SRI
(TNAU Farm, Coimbatore & Farmer’s fields, Coimbatore Dt.) |
7 t ha-1NPK from fertilizer
8 t ha-1NPK from fertilizer 9 t ha-1NPK from fertilizer 7 t ha-1IPNS package* 8 t ha-1IPNS package* 9 t ha-1IPNS package* |
173
222 271 133 182 232 |
62
83 100 39 60 80 |
74
99 100 39 67 95 |
6.68
7.65 8.18 6.94 7.94 8.34 |
7059
9336 10775 4514 6874 9199 |
1.92
2.10 2.18 1.97 2.15 2.16 |
| 3. Wheat – Hill
Farmer’s fields, Kalrayan foothills, Salem Dt. and Kolli foothills, Namakal Dt.). |
3.5 t ha-1NPK from fertilizer
4.0 t ha-1NPK from fertilizer 3.5 t ha-1IPNS package* 4.0 t ha-1IPNS package* |
156
194 109 147
|
111
129 100 117 |
41
59 28 37
|
3.55
4.07 3.63 4.16 |
8269
10077 6828 8337 |
1.54
1.66 1.49 1.62 |
| 4. Wheat – Plains
(Farmer’s fields, Coimbatore Dt.) |
3 t ha-1NPK from fertilizer
4 t ha-1NPK from fertilizer 3 t ha-1IPNS package* 4 t ha-1IPNS package* |
119
196 65 152 |
91
110 74 105 |
51
72 37 55 |
2.90
3.93 2.98 4.05 |
7161
9560 5325 8328 |
1.33
1.66 1.31 1.61 |
| 5. Maize – Hybrid
(Farmer’s fields, Coimbatore and Dindigul Dts.) |
9 t ha-1NPK from fertilizer
10 t ha-1NPK from fertilizer 11 t ha-1NPK from fertilizer 9 t ha-1IPNS package* 10 t ha-1IPNS package* 11 t ha-1IPNS package* |
244
290 329 202 249 289 |
98
124 139 78 104 119 |
82
97 113 52 69 86 |
8.97
10.09 10.33 9.23 10.5 10.59 |
9833
12032 13653 7546 9813 11474 |
2.04
2.17 2.13 2.05 2.21 2.14 |
| 6. Rain fed Bt
Cotton (Farmer’s fields, Perambalur Dt.)
|
2.8 t ha-1NPK from fertilizer
3.2 t ha-1NPK from fertilizer 2.8 t ha-1IPNS package* 3.2 t ha-1IPNS package* |
103
123 78 99 |
71
81 51 67 |
74
89 48 64 |
2.67
3.07 2.84 3.24 |
6665
7796 4690 6147 |
1.46
1.64 1.51 1.68 |
| 7. Onion
(Farmer’s fields, Coimbatore Dt.)
|
17 t ha-1NPK from fertilizer
20 t ha-1NPK from fertilizer 17 t ha-1IPNS package* 20 t ha-1IPNS package* |
89
117 37 71
|
18
33 14 34 |
26
31 14 32
|
17.24
18.75 17.72 19.48 |
2632
3816 1494 3350 |
2.34
2.50 2.33 2.50 |
| 8. Okra (Bhendi)
(Farmer’s fields, Coimbatore Dt.)
|
15 t ha-1NPK from fertilizer
17 t ha-1NPK from fertilizer 15 t ha-1IPNS package* 17 t ha-1IPNS package* |
78
97 51 70 |
45
54 30 39 |
15
15 8 8 |
15.5
16.59 15.95 17.36 |
3480
4133 2253 2905 |
2.01
2.14 2.10 2.18 |
| 9. Cabbage
(Farmer’s fields, Coimbatore Dt.)
|
60 t ha-1NPK from fertilizer
70 t ha-1NPK from fertilizer 60 t ha-1IPNS package* 70 t ha-1IPNS package* |
139
194 109 164 |
64
93 49 78 |
23
41 15 29 |
59.90
70.50 61.00 71.80 |
5327
7859 4036 6456 |
2.43
2.78 2.44 2.79 |
| 10. Potato (Farmer’s fields, Nilgiris Dt.) | 30 t ha-1NPK from fertilizer
40 t ha-1NPK from fertilizer 30 t ha-1IPNS package* 40 t ha-1IPNS package* |
105
175 98 168 |
306
446 297 437 |
59
131 55 127 |
27.60
38.80 29.20 40.40 |
17460
26967 16837 26344 |
1.85
2.38 1.94 2.46 |
| 11. Carrot (Farmer’s fields, Nilgiris Dt.) | 40 t ha-1NPK from fertilizer
50 t ha-1NPK from fertilizer 60 t ha-1NPK from fertilizer 40 t ha-1IPNS package* 50 t ha-1IPNS package* 60 t ha-1IPNS package* |
125
173 221 117 165 213 |
145
256 367 139 250 361 |
39
66 127 36 64 120 |
40.90
52.50 59.90 43.30 53.70 62.60 |
9468
16075 23634 9004 15639 23058 |
2.45
2.92 3.07 2.54 2.92 3.15 |
| 12. Beetroot (Farmer’s fields, Coimbatore | 40 t ha-1NPK from fertilizer
50 t ha-1NPK from fertilizer
|
99
163 |
134
186 |
80
131 |
39.50
49.98 |
9786
14443 |
2.37
2.77 |
| and Dindigul Dts.) | 40 t ha-1IPNS package*
50 t ha-1IPNS package* |
59
123 |
113
165 |
54
99 |
40.48
51.37 |
7588
12077 |
2.37
2.78 |
| 13. Radish (Farmer’s fields, Coimbatore and Dindigul Dts.) | 40 t ha-1NPK from fertilizer
50 t ha-1NPK from fertilizer 40 t ha-1IPNS package* 50 t ha-1IPNS package* |
112
181 67 136 |
50
78 24 52 |
71
114 52 87 |
37.20
48.80 38.40 50.60 |
5686
9035 3387 6512 |
2.23
2.74 2.24 2.78 |
| 14. Tomato (Farmer’s fields, Coimbatore and Dindigul Dts.) | 70 t ha-1NPK from fertilizer
80 t ha-1NPK from fertilizer 90 t ha-1NPK from fertilizer 70 t ha-1IPNS package* 80 t ha-1IPNS package* 90 t ha-1IPNS package* |
164
209 254 120 165 210 |
135
177 219 113 155 197 |
148
188 228 113 153 193 |
70.90
80.80 88.30 72.20 81.30 89.50 |
12502
16152 19801 9957 13606 17256 |
2.47
2.71 2.86 2.50 2.71 2.88 |
| 15. Ashwagandha
(Farmer’s fields, Salem Dt.) |
0.7 t ha-1NPK from fertilizer
0.9 t ha-1NPK from fertilizer 0.7 t ha-1IPNS package* 0.9 t ha-1IPNS package* |
49
79 20 59 |
74
109 51 87 |
66
77 40 68 |
0.671
0.871 0.696 0.905 |
5949
8276 3784 6741 |
1.31
1.24 1.28 1.19 |
STCR-IPNS package*: For SI. Nos 1-9 and 14 – 15, FYM was applied @12.5 t/ha For SI. Nos. 10-13, Vermicompost was applied @ 5 t/ha.
v Fertilizer recommendations for fixed cost of investment and allocation under resource constraints: The soil test-fertilizer requirement calibration for targeted yield also provide the means for calculating soil critical levels above which there is no fertilizer requirement indicated levels of expected crop production. A new dimension to the value of the utility of soil testing has been added by the concept of fertilizer application for targeted yield demonstration laid by IARI in farmers’ fields by choosing the yield target at such a level so that the cost of fertilizer requirement becomes more or less same as what was being practiced by farmers already.