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AGRICULTURAL RESEARCH STATION - VIRINJIPURAM

I. INTRODUCTION

The Agricultural Research Station, Virinjipuram comes under North Eastern Zone region of Tamil Nadu. It is one of the 32 Research  Stations of Tamil Nadu Agricultural University (TNAU), Coimbatore which was ranked as the best Agricultural University in India during the year 1999.

This research station is located in Virinjipuram village of Katpadi Taluk of Vellore District. It is about 15 km. away from Vellore bus stand on the Chennai-Bangalore National Highway and 21 km from Katpadi railway station.

II. ABOUT THE FARM

                                         Total area :           23.58 Hect.
                                     Irrigated area :           15.30 Hect.
                                             Rainfed :           08.28 Hect.
                                              Soil Type :           Sandy loam
                                               PH :           7.8
                          Average Annual Rainfall :           860 mm.
                    Mean Maximum Temperature :           33.1.C
                    Mean Minimum Temperature :           22.8.C

III.   OBJECTIVES OF THE RESEARCH STATION

               Following are the five University Plan schemes now in operation at this research station.

1.Banana Research Scheme

This Scheme is in operation from 1.12.1980 at this centre with the main objective of introduction new varieties of banana (Musa Sp)under well irrigated conditions besides maintenance of Banana Germplasm.

2.Agricultural Research Station Scheme

                  This scheme was started on 1.4.1984. The main objectives of this scheme are

a.       To evolve high yielding Thalaivirichan type of Sorghum varieties

b.      To evolve long, compact and bold grained bajra varieties

c.       Production of breeders seeds in greengram and groundnut

3. Sweet Sorghum Scheme

This Scheme is in operation from 1.4.90 at this station. Screening and development of sweet sorghum varieties  with starch content for industrial use is the main objective of this scheme.

4. National Agricultural Research Project Scheme (NARP) Phase II

                This scheme is functioning from 1.11.1988 at this centre. The main objectives are:

a.       Improvement of filed and Horticultural crops

b.      To evolve production technologies for horticultural and field crops

c.       Studies on weed and water management for various field crops

d.      Studies on amelioration of tannery pollution in Vellore District

e.       Studies on Pest and disease management in Banana, Brinjal, Tomato, Sorghum, Pulses, Lablab etc.,

5. Plant Clinic Centre Scheme

                    This scheme is functioning at this centre from 1981 with the following objectives.

a.      To identify farmers' field problems like pests, diseases, nutritional disorders etc and to suggest suitable remedial measures.

b.      To conduct on-farm trials of latest technologies in farmers' holdings.

c.       To study the seasonal incidence of pests and diseases and to forewarn their outbreak

d.      To impart training to farmers, farm women and extension functionaries on latest technologies of farming and on cultivation of edible mushroom.

 

Centrally Sponsored Scheme – National Watershed Development Project for Rainfed  Areas (NWDPRA)

This scheme is in operation since October 1997 with the main objective of laying out trials mostly on water   and soil   conservation measures in 18 watersheds of Vellore and Tiruvannamalai Districts.

       IV. ACHIEVEMENTS

A.  Crop Improvement

    A Greengram culture VMGG 97001 which is a pure line selection from the variety K.851 Greengram. This culture recorded the highest yield of 1020 Kg/ha than the ruling varieties KM.2 and VBN.1.

·    The Culture VMS 98001, a thalaivirichan type sorghum is found to be most promising culture for this tract

·   A total quantity of 3887 Kgs of K.851 greengram breeders seed was produced and supplied to farmers through Department of Agriculture.

B. Crop Management

·       Electrical conductivity of contaminated ground water samples indicated the toxic EC range of 9-10 dsm-1 .

·     Phytotoxic elements like Sodium and Chloride exceeded theoretical limits and recorded 2935 mg/1 and 223 mg/1 respectively.

·       Water hyacinth was found to absorb the toxic element chromium and retained it in roots (4-8 ppm) and in leaves (2-5 ppm)

·      The bacteria, Pseudomonas sp. was found to be useful in effluent separation of sludge and thereby reducing the toxicity of the effluent

·      Application of tannery effluent to soil resulted in reduction of hydraulic conductivity from 7.48 to 3.35 cm/hour, soil porosity from 41.2 to 31.6% and increased the bulk density from 1.4 to 1.5 g/cc.

·     Co.1 and African tall Maize, Co.13 Ragi and BN.1 grass were identified as suitable crops for tannery polluted areas. Desmanthus and Korai come up well even when irrigated with raw effluent

·    Application of composted coconut coir pith @ 10t/ha in the tannery polluted area was found to be best soil amendment.

·     Soil application of animal skin waste and tannery sludge increased the available nitrogen and phosphorus content while the available   potassium content was unaltered. However the electrical conductivity of soil increased from 0.1 to 0.8 dsm-1

C.     Crop Protection

  • Spraying of neem seed kernel extract (NSKE) 5% at 10 days interval  from flower   initiation was found to be   effective for the management of fruit borer in brinjal.

·    Spraying of NSKE 5% thrice at 10 days interval from flower initiation was found to be most effective against the grainpod borer Helicoverpa armigera on redgram.

·    Sorghum cultures viz., EC 0024, MS 1142 and TNSH 9407 were found to be resistant to Sorghum shoot fly.

·    Spraying of NSKE 5% on 10th and 20th day after sowing was found to be effective in controlling sorghum shoot fly

·    Capsule application of Carbendazim 60 mg/corm effectively control the banana disease of banana

·   Incorporating the antagonists viz., Trichoderma viride and Trichoderma harsianum on application of neem cake @ 8kg/sq.m in nursery reduces the damping off disease of tomato

·     Spraying mancozeb 0.2% thrice at tri-weekly intervals effectively controlled leaf spot disease of tomato

    D. Horticulture

·         Application of neem cake blended urea increased the productivity of banana (Rasthali) by 2700 kg/ha and reduced   nematode population

·     Glyphosate at 2.0 kg/ha as post emergence treatment gave good weed control in banana sowing about Rs.800/ha in production cost.

·     Among the four banana clones studies for then drought tolerance, it was found that Poovan was most tolerant to water stress conditions (irrigating once in 21 days) as it recorded the highest bunch weight.

·     The Dwarf Cavendish banana can be grown at a spacing of 1.5 x 1.5m (4444 Plants/ha) which accommodates 1358 more plants per hects as compared to the earlier practice of 1.8 x 1.8m (3086 Plants/ha)

·       The culture VMB 7 has been identified as a promising "Mullukathiri" – Local brinjal for Vellore District.

·       In papaya, CP 11 culture has been isolated as a long size papaya suited to this tract.

Farmers and Extension functionaries are being benefited as follows through Plant Clinic Centre functioning at  this Centre.

 

Details on Extension Works Carried out

Sl.No.

Particulars

Number

1.

Field visits made to identify field problems and to suggest remedial measures and Farm advisory services rendered

2132

2.

On/Off campus training conducted

356

3.

Seminars conducted

36

4.

All India Radio messages broadcasted

184

5.

Publication of popular articles

194

6.

Group meetings conducted

206

       Monthly Zonal Workshop meetings:

 Every month all the development Department staff and the scientists of this research station participate in Zonal workshop meeting and finalise the messages on crop cultivation to be disseminated to the farmers.

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