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No. of Trial : 10 |
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Title of on-farm trials : “Increase productivity of Black Gram through use of PSB and Rhizobium culture under rain-fed condition” |
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Problem diagnose : Low availability of available phosphorus due to high phosphate fixing characteristics of acidic soil . rogen use efficiency is very low due to poor water holding capacity of soil. |
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Details of technologies selected for assessment/refinement T1- Farmer’s practice (No use of fertilizer) T2- 50% RDF (10:20:10::N:P2O5:K2O)ha-1 T3- PSB + Rhizobium T4- 25% N + PSB + Rhizobium |
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Final Recommendation for micro level situation Treatment T3 may be the best recommendation for increasing the productivity at the micro level situation Constraints identified Technology (Foliar application of nitrogen) was unknown to the farmers Spraying is difficult in rainy season Sprayer not available in the local market Feedback from the farmer Farmers were satisfied as the technology is affordable and easy to apply |
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Soil Science (1) |
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Treatment
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pH |
Available N (kg/ha) |
Available P2O5 (kg/ha) |
Available K2O (kg/ha) |
Yield q/ha |
BC Ratio |
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T1- Farmer’s practice (No use of fertilizer) |
5.4 |
185.8 |
21.7 |
218.5 |
4.56 |
2.53:1 |
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T2- 50% RDF (10:20:10::N:P2O5:K2O)ha-1 |
5.3 |
180.2 |
21 |
221.7 |
6.25 |
2.86:1 |
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T3- PSB + Rhizobium |
5.6 |
195.7 |
23.7 |
212.4 |
5.35 |
2.9:1 |
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T4- 25% N + PSB + Rhizobium |
5.3 |
210.5 |
25.4 |
214.5 |
6.6 |
3.2:1 |