Browsing by Author "Nelliat, E.V."

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    Beneficial effects of crop combination of coconut and cacao
    (1975-04) Nair, P.K.R.; Rama Varma; Nelliat, E.V.; Bavappa, K.V.A.
    A field experiment on mixed cropping of coconut and cacao was initiated in 1970-71 in an existing 16-year-old coconut plantation of high-yielding genotypes. Cacao was planted in 2 systems - single hedge (single row of cacao between rows of coconut) and double hedge (2 rows of cacao between rows of coconut). There was also a control plot of pure stand of In 1973 the yield of cacao (number of pods/plant) was identical under both methods of planting but in 1974 it was significantly more in the single hedge. The average increase in the yield of coconut under control, single hedge and double hedge worked out to 64.3, 68 I and 115.9%, respectively, over the pre-experimental yield of the corresponding groups. The increase in the control plot was due to better management practices. The additional increase in yield of coconut under mixed cropping with cacao could be due to the synergistic effect of crop combination.
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    Beneficial effects of crop combination of coconut and cacao
    (2007-02-08) Nair, P.K.R.; Rama Varma; Nelliat, E.V.; Bavappa, K.V.A.
    A field experiment on mixed cropping of coconut and cacao was initiated in 1970-71 in an existing 16-year-old coconut plantation of high-yielding genotypes. Cacao was planted in 2 systems - single hedge (single row of cacao between rows of coconut) and double hedge (2 rows of cacao between rows of coconut). There was also a control plot of pure stand of In 1973 the yield of cacao (number of pods/plant) was identical under both methods of planting but in 1974 it was significantly more in the single hedge. The average increase in the yield of coconut under control, single hedge and double hedge worked out to 64.3, 68 I and 115.9%, respectively, over the pre-experimental yield of the corresponding groups. The increase in the control plot was due to better management practices. The additional increase in yield of coconut under mixed cropping with cacao could be due to the synergistic effect of crop combination.
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    Beneficial interactions of coconut-cacao crop combination
    (2007-02-08) Thomas Varghese, P.; Nelliat, E.V.; Balakrishnan, T.K.
    A study on the amount of cacao litter added to the soil in a coconut-cacao crop mix was conducted at the Central Plantation Crops Research Institute, Kasaragod. Shed leaves collected at fortnightly intervals for a one year period amounted to 818 and 1785 kg/ha/year (oven dry) under single and double hedge systems of planting, respectively. The organic carbon content and the soil fertility improved considerably under the crop mix, and was reflected in the enhanced yield of coconut. Soil temperature at 30 and 60 cm depths was 3 to 6°C lower and the variation in the mean monthly soil temperature was least in the mixed cropping system compared to the monoculture of coconut. The yield increase noticed in coconut when cacao was grown as mixed crop is discussed.
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    Coconut processing—Problems and prospects
    (2007-02-08) Jaswant Singh; Nelliat, E.V.
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    Crop mixing in coconut holdings
    (2007-02-08) Nelliat, E.V.
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    Economics of inter and mixed cropping in the coconut gardens of Kerala: Some preliminary findings
    (2007-02-08) Krishnaji, N.; Chandan Mukherjee; Nelliat, E.V.; Nair, P.K.R.; Jacob Mathew; Thomas Varghese, P.
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    Economics of inter and mixed cropping in the coconut gardens of Kerala: some preliminary findings
    (Centre for Developement Studies, Trivandrum, 1976-10) Chandan Mukherjee; Nelliat, E.V.; Nair, P.K.R.; Jacob Mathew; Thomas Varghese, P.; Krishnaji, N.
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    Effect of month of harvest of seednuts and fertilizer application to nursery on vigour and quality of coconut seedlings
    (1976-06) Nelliat, E.V.; Nair, P.K.R.; Kushwaha, B.L.
    The germination pattern and quality of seedlings produced from seed coconuts harvested during different 1110nths of the year and the effect of application of fertilizers to seedlings in the nursery were studied. The nuts germinated satisfactorily irrespective of the month of harvest, but nuts sown during June-September (harvested during April-June) germinated early (mean 125 days). Considering seedling vigour as measured by number and area of leaves, height of plants and girth at collar, May and June were the most favourable months for sowing seednuts. Application to the nursery of NPK fertilizers in combination with Ca -:-Mg improved seedling vigour and quality as indicated by higher chlorophyll content and nutrient concentration in leaves. Seedling growth was adversely affected by application of ea + Mg in the absence of NPK.
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    Effect of NPK fertilization on the mineral nutrition and yield of three coconut genotypes
    (1986) Hameed Khan, H.; Gopalasundaram, P.; Joshi, O.P.; Nelliat, E.V.
    Annual application of NPK fertilizers over a 18 year period to coconut on red sandy loam soils resulted in a minimal increase in mineralisable N, but in a marked increase in available P and K. Plant N levels, however, reflected the improved N nutrition but did not reach sufficiency levels found elsewhere. An available P status of 15 ppm in the control plots kept leaf P at sufficiency levels. P fertilizers did not increase the P content of leaves. K fertilizers raised the K leaf content to sufficiency levels. Doubling the M, fertilizer rates of 500 gN, 220 gP and 830 gK per palm per year had no effect on N, P and K levels in the palm leaves. Changes in K levels of the leaves had antagonistic effects on leaf Mg (r = — 0.68**) and leaf Na (r = — 0.87 **). As this effect brings leaf Mg close to deficiency values palms receiving K might need additional Mg as well. The findings and interpretation of soil and leaf analysis data were confirmed by large yield responses to application of NPK fertilizers. Genetic differences between palms in their response to levels of nutrient supplies were apparent. The CDO X WCT hybrid out-yielded the high yielding WCT variety especially when NPK was given at the M, level. The response in yield to applied fertilizers was linear for WCT and curvilinear for the hybrids CDO X WCT and WCT X CDO.
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    Evaluation of weather data for drying and storage of copra
    (2007-02) Patil, R.T.; Nelliat, E.V.; Balakrishnan, T.K.
    Weather data such as mean daily temperature, relative humidity, wind velocity, sunshine hours and rainfall per meteorological week at Kasaragod (HT MSL -10.7 m 12 .30N Latitude and 75°E Longtiude) were evaluated for predicting suitable drying period and safe storage period. Equilibrium moisture content of copra at all meteorological weeks was determined. The time required for drying was calculated per week from the energy associated with ambient air. The copra can be dried from 40th week to 20th week within 8 days. Drying can be achieved within 6 days if dried during 13th to 19th week. Drying can be achieved even during 40th to 48th week and 21st to 22nd week if solar cabinet drier is used, because during this period precipitation over 25 mm/week is expected. During the predicted suitable drying period solar radiation available is in the order of 5000 k Cal/m /day and hence drying process can be accelerated by trapping this energy by use of solar drier. Copra can be stored safely in well ventilated storage structures except in 25th to 39th week, relative humidity being below 80%. If proper ventilation is not maintained it may deteriorate even from 22nd week. From 22nd to 41st week the relative humidity ranges between 80-90% and equilibrium moisture content of copra above 4% which attracts fungus Penicillium frequentas. To avoid this, supplemental heat aeration (5°C above ambient) or use of industrial dessicants may be practised in storage structure.
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    Farm Plan Models
    (2007-02) Nelliat, E.V.
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    Frequency of fertiliser application to bearing coconut palms-Effect on yield and yield components
    (1975) Markose, V.T.; Nelliat, E.V.
    The results of a field experiment conducted to evaluate the relative benefits of fractionated annual and biennial applications of fertilisers to coconut, are presented in this paper. The highest response in terms of yield of ripe nuts and copra outturn per palm was obtained when annual dose of fertilisers was applied in two splits. Effect on the yield -components, viz., production and percentage set of female flowers, and copra content of nut, is also discussed.
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    Frequency of fertilizer application to bearing coconut palms – Effect on yield and yield components
    (2007-02) Markose, V.T.; Nelliat, E.V.
    The results of a field experiment conducted to evaluate the relative benefits of fractionated annual and biennial applications of fertilisers to coconut, are presented in this paper. The highest response in terms of yield of ripe nuts and copra outturn per palm was obtained when annual dose of fertilisers was applied in two splits. Effect on the yield -components, viz., production and percentage set of female flowers, and copra content of nut, is also discussed.
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    Garden land management
    (2007) Nelliat, E.V.
    THE garden land of the humid tropics responds to intensive management. It comprises the deep sands of the coastal tract, fairly level deep red loam, the medium deep to shallow laterite soil of the slopes and shallow lateritic gravelly soil with rocky patches of the hill tops. The diverse physico-chemical properties of these soils necessitate adoption of location-specific agro-techniques to achieve the high production potential.
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    Influence of Long Term Cultural Operations on Physical and Water Retention Characters of a Red Sandy Loam Soil
    (1986-06) Joshi, O.P.; Varghese, P.T.; Nelliat, E.V.; Hameed Khan, H.
    The effects of long term manurial-cum-cultural practices, imposed since 1919 and modified in 1972, on physical and water retention properties of a red sandy loam soil planted to coconut, were studied. The treatments like forking basins after inorganic fertilization, no tillage and no manuring, and tillage with organic and inorganic fertilization, showed an improvement in water holding capacity, bulk density, estimated porosity and available water capacity over the treatment of tillage alone when tested for their cumulation effect during 1982. More or less a similar trend was observed for water retained at various tensions. However, the treatments like forking basins after inorganic fertilization, no tillage and no manuring and tillage with organic and inorganic fertilization had an edge over other treatments. The data revealed that minimum disturbance of soil by way of forking after inorganic fertilization helped in maintaining better physical environment in basins of coconut palms over other treatments.
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    Input management for obtaining targetted yield in coconut
    (2007-02) Nelliat, E.V.; Gopalasundaram, P.