Field Demonstration
To demonstrate the usefulness of Biofertiliser and to its impact in increasing
the crop productivity, large number of field demonstration
are being conducted by
RBDC, Imphal. To convince the farmers about the potentiality or different biofertilizers in different crop, demonstrations on farmer’s field is the most effective extension method.
In
this programme a demonstration is put up on 1 acre land of any progressive
farmer in a crop of farmer's choice. Half of the plot is save as per the farmers
package of practices and half plot is save with Biofertilisers. When crop is in
full bloom and the impact of Biofertilisers are quite visible, the field day/
Kisan Mela is organised at that side.
In
the field day/Kisan Mela 50 farmers from nearby villages are being invited. 3-4
expects explain the farmers about the usefulness of Biofertilisers and the
impact is physically shown in the demonstrative plot. Necessary literature in the local language is also distributed among the
farmers.
Every year 10 demonstrations
are being taken up directly by RBDC,Imphal and 45 demonstration are being conducted
through State Agriculture Deptts, Krishi Vigyan Kendras or through some NGOs.
Guidelines for laying a demonstration
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Select ˝ acre to 1 acre plot belonging to interested farmer having progressive
attitude. |
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The selected site must be uniformly leveled and should have uniform
fertility. |
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Measure the plot and divide it into 3 equal parts. If plots size is bigger, then demonstration can
also be laid in standard random block design with 3 replications and 3 treatments. |
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Treatments – (1) Untreated control with 100%
N.P.K. as per recommendations
(2) 75% N, 85% P2O5, 100% K + Biofertilizer (for N+P)
(3) 50% N, 75% P2O5, 100% K + Biofertlizer (for N+P) |
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Divide the seeds to be sown or seedlings to be transplanted into 3 equal parts. Leave one part as untreated control and treat the
remaining 2 parts of seeds/seedling with biofetilizers as per recommendations.
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Sowing/planting should be done immediately after treatment. First sow/transplant untreated seeds/seedling followed by treated ones. |
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In case of crops where biofertilizers are to be applied as soil treatment, apply biofertilizer compost mixture only in treated plots while control plot be treated with equal quantities of blank compost (without
bioferlizer) |
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Chemical fertilizer is to be applied in normal way. Reduce the quantity of N and P2O5 as recommended above in biofertilizer treated plots from al the split doses in equal quantities. |
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After sowing, mark the plots with proper placards and demarcate them with bunds if possible. |
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Follow usual recommended cultural practices |
Observations:
Following observations should provide conclusive proof of biofertlizer impact:
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(a) % emergence of seedling per sq m after 10-15 days of sowing. |
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(b) Total fresh weight and dry weight of plants after 60-90 days of sowing. |
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(c) No. of nodules/plant in case of leguminous plants. |
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(d) Yield. |
Precautions :
To assess the total yield, harvest the crop from each plot leaving a minimum of 1 m of border row from all the sides. Try to harvest the crop from the measured square area (e.g. Take 5m X 5m area for evaluation of yield).
Thrash the crop after proper drying, separately for all the three treatments and record the yield. Convert the obtained yield into q/ha and compare with control.
Conclusion:
In case of leguminous corps where Rhizobium fertilizer is used if all the three plots show almost equal yields, that means Rhizobium biofertilizer is used if all the three plots show almost equal yields, that means Rhizobium biofertilizer along with phosphatika can supplement upto 50% of required N and 15-25 % of P2O5.
In case of non leguminous crops where Azotobacter or Azospirillium is used along with
Phosphatika.
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(a) If the yield in biofertilizer treated plot with 75% NPK is equal or higher than control plot and the yield in biofertilizer treated plot with 50% N is less than other two plots it means that biofertilizer application is supplementing only 25% to 30% of N and 15% of P2O5. |
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(b) If the yield in all the three plots is almost at par with each other it means that biofertilizer application is supplementing 50% N and 25% P2O5. |
(c) If the yield in biofertilizer treated plots are significantly lesser than control plot it means that biofertilizer has not worked properly.
(i) either the biofertilizer is not good or exposed to high temperature.
(ii) Or there is some problem in soil or with application methodology. |
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