Browsing by Author "Khan, H.H."

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    Advances in coconut research and development
    (2007-02-08) Nair, M.K.; Khan, H.H.; Gopalasundaram, P.; Bhaskara Rao, E.V.V.
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    Available micronutrient status of the coconut-tract of Kasaragod District, Kerala
    (2007-02-08) Manikandan, P.; Joshi, O.P.; Khan, H.H.; Biddappa, C.C.
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    Banawali types of coconut (Cocos nucifera L.) of the Konkan Region of Maharashtra State
    (Indian Coconut Journal, 2003-11) Nagwekar, D.D.; Sawant, V.S.; Desai, V.S.; Mahadik, M.V.; Khan, H.H.; Joshi, G.D.; Jambhale, N.D.
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    Coconut and arecanut based high density multispecies cropping systems
    (2007-02-08) Bavappa, K.V.A.; Kailasam, C.; Khader, K.B.A.; Biddappa, C.C.; Khan, H.H.; Kasthuri Bai, K.V.; Ramadasan, A.; Sundararaju, P.; Bopaiah, B.M.; George V. Thomas; Misra, L.P.; Balasimha, D.; Bhat, N.T.; Shama Bhat, K.
    High density multispecies cropping models were laid out one each in coconut and arecanut plantations during 1983. Data on various aspects of the system behaviour showed that the yield of coconut and arecanut increased to the extent of 176% and 12S% respectively in the two systems. The possibility of getting additional yields due to cropping system approach was, evident. There was no marked yield difference of the crops in the full, two-third and one-third levels of fertilizers applied though depletion in N and Mg balance was indicated. The air space utilisation was 31% in coconut while it was 63% in the arecanut system. The biomass production of the two systems showed that there was substantial increase in coconut biomass while the biomass of other crops remained more or less the same. In general, there was build-up of P and K nutrients in the systems. Under the arecanut system N also showed increased balance. There was improved microbial activity in the systems. No serious pest and disease management problems were indicated due to the high density cropping system approach. A number of crop varieties and hybrids tolerant/resistant to the nematode pathogen could be identified. The interaction of various, factors for exploiting higher levels of productivity through a system approach and the need for predicting crop choices based on data and crop performance are discussed in the paper.
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    Effect of heavy metals on micronutrient nutrition of coconut
    (1988-10) Biddappa, C.C.; Khan, H.H.; Joshi, O.P.; Manikandan, P.
    The influence of root feeding of Cd, Al, Cr, Ba, Bi and Pb on the micro-nutrient concentration in coconut crown was studied. Results indicate that the concentration of Fe, Mn, Zn and Cu had, in general, increased due to heavy metal treatments in all the leaf positions. Significantly higher concentration of Fe due to Cr treatment, Mn due to Bi, Zn due to Ba and Cu due to Pb was observed.
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    Effect of heavy metals on micronutrient nutrition of coconut
    (2007-02-08) Biddappa, C.C.; Khan, H.H.; Joshi, O.P.; Manikandan, P.
    The influence of root feeding of Cd, Al, Cr, Ba, Bi and Pb on the micro-nutrient concentration in coconut crown was studied. Results indicate that the concentration of Fe, Mn, Zn and Cu had, in general, increased due to heavy metal treatments in all the leaf positions. Significantly higher concentration of Fe due to Cr treatment, Mn due to Bi, Zn due to Ba and Cu due to Pb was observed.
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    Effect of plant products on the management of basal stem rot (Ganoderma) of coconut
    (2007) Karunanithi, K.; Sarala, L.; Rabindran, R.; Sabitha Doraisamy; Rajarathinam, S.; Khan, H.H.
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    Effect of root feeding of heavy metals on the leaf concentration of P, K, Ca and Mg in coconut (Cocos nucifera L.)
    (1987) Biddappa, C.C.; Khan, H.H.; Joshi, O.P.; Manikandan, P.
    The effect of supplying various metals viz. Pb, Cd, Al, Bi, Cr, Cu and Ba to the roots of coconut palms on the P, K, Ca and Mg concentration in the leaves of coconut palms was investigated. The results showed that compared with the control the amount of leaf phosphorus was reduced by all the metals. The K concentration in the leaves was reduced by Al, Cd and Ba but increased by Bi and Cr. Leaf Ca concentration was decreased by Al and Pb treatments and increased by Cd, Cr and Ba. The amount of magnesium in the leaves was low in palms receiving the Al and the Cr but enhanced by Pb.
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    Effect of root feeding of heavy metals on the leaf concentration of P, K, Ca and Mg in coconut (Cocos nucifera L.)
    (2007-02-08) Biddappa, C.C.; Khan, H.H.; Joshi, O.P.; Manikandan, P.
    The effect of supplying various metals viz. Pb, Cd, Al, Bi, Cr, Cu and Ba to the roots of coconut palms on the P, K, Ca and Mg concentration in the leaves of cocnut palms was investigated. The results showed that compared with the control the amount of leaf phosphorus was reduced by all the metals. The K concentration in the leaves was reduced by Al, Cd and Ba but increased by Bi and Cr. Leaf Ca concentration was decreased by Al and Pb treatments and increased by Cd, Cr and Ba. The amount of magnesium in the leaves was low in palms receiving the Al and the Cr but enhanced by Pb.
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    Eriophyid Mite Infestation on Coconut in West Bengal
    (2003-07) Apurba Bandyopadhyay; Khan, H.H.
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    Evaluation of Coconut Germplasm in the Konkan Region of Maharashtra State
    (2002-03) Nagwekar, D.D.; Sawant, V.S.; Joshi, G.D.; Khan, H.H.
    Fifteen genotypes of coconut planted in 1958 were evaluated for yield attributes under irrigated condition at the Regional Coconut Research Station, Bhatye, Rantagiri (M.S.) representing sandy soil of Konkan region of Maharashtra State. So far one variety viz. Pratap has been released and two varieties viz. Laccadive Ordinary and Philippines Ordinary and one hybrid T x D have been recommended for cultivation in the Konkan region of Maharashtra State. The performance of these varieties and hybrids has been evaluated in this paper.
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    Ganodema / Thanjavur Wilt/ Basal Stem Rot Disease of Coconut
    (2003-03) Jayalakshmi, V.; Khan, H.H.
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    Genetic improvement of coconut (Cocos nucifera L.) in Tamil Nadu
    (2003-05) Ganesamurthy, K.; Natarajan, C.; Packiaraj, D.; Rajarathinam, S.; Khan, H.H.
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    High production technology in coconut
    (2007-02) Nair, M.K.; Khan, H.H.; Gopalasundaram, P.
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    Influence of Waste Recycling on Nutrient Status of the Soil in High Density Multispecies Cropping System
    (2002) Ravi Bhat; Sujatha, S.; Khan, H.H.; Sivakumar, K.; Siju Antony
    A project was initiated at Central Plantation Crops Research Institute, Regional Station, Vittal, India during 1999 in an existing areca garden with the objective to assess the biomass availability and feasibility of recycling into the system. The main crop was arecanut and other crops in the system were cocoa, clove, coffee, banana and pepper. The areca was planted in 1965, cocoa and clove in 1983 and the other crops in 1999. There were four treatments viz., control (only organic matter recycling (OMR)), 113rd of the recommended chemical fertilizer and OMR, 213rd of the recommended chemical fertilizer and OMR and full chemical fertilizer and OMR. The treatments were replicated five times. The wastes available from different crops were collected and they were converted into compost using earthwonns. The total recyclable biomass through the waste materials from the cropping system was recorded as about 7.7 tlhalyear from areca, cocoa and clove. The materials were converted into compost using earthworms with 80 per cent recovery. The soil was analysed for organic carbon, mineralisable nitrogen, phosphorus and potash. There was an increase in the organic carbon, nitrogen, phosphorus and potassium content in the s il after the application of compost. The increase was to the extent of about 30%. Thus recycling of the wastes avafS a ble garden has improved the nutrient content of the soil. Thus in the present day of scarce availability of organic materials from external sources, recycling of the available wastes from the existing gardens especially in arecanut based cropping systems would be an important practice for sustainable agriculture.
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    Nutrition of Hybrid Coconut
    (2007-02) Biddappa, C.C.; Bopaiah, M.G.; Khan, H.H.
    Comparatively, removal of NPK and other nutrient elements by hybrid varieties appears to be lesser than that of the tall varieties of coconut as revealed by the analysis of components. This is supported by the results of 15 year old manurial trial with WCT and three hybrids at CPCRI, Kasaragod. These results have shown that theoretically (M-B model) just to realize 50 per cent of maximum yields COD x WCT and WCT x COD require only 75:75:150 and 144:144:288 g N, P2O5 and K20 respectively and to obtain 87.5 per cent of the maximum yield, the fertilizer application can be tailored to two third quantity. Nutrient relationship to yield of coconut has shown good indications. Nitrogen content of all the leaf ranks (except 6) significantly related to yield in which leaf No.l was showing highest correlation. The K values of all the leaves (except No.l) are significantly related to yield. The study on chemical potential in the palm and their relationship to the yield has indicated positive correlation of leaf K and Mg with coconut yield. The D x T among the available hybrids was registered to be efficient user of nutrients in the cellular fractions of the constituents.
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    Nutritional Requirement of Coconut and Coconut Based Farming Systems in India
    (2007-02) Cecil, S.R.; Khan, H.H.
    The growth of young palms is influenced maximum by N, followed by K. While the effect of P has been marginal, it shows favourable interactions with N and K on growth and nut yield. Nutrient removal studies indicate that K is the dominant requirement for increasing the productivity of the palm. Increased rates of N had an adverse effect on copra content while K showed beneficial effect on all production factors. The hybrids (COD x WCT and its reciprocal cross) did not show response to levels beyond 500 g N + 500 g P2O5 + 1000 g foO/palm/year under rainfed conditions while high yielding West Coast Tall showed response to 1000 g N + 1000 g P2O5 + 2000 g K20/palm/year. Magnesium has been a limiting nutrient in coastal sandy and laterite soils and the correction of Mg deficiency leads to 30-35 per cent increase in yield. Recycling long-term resources of soil P has been suggested and 10 to 12 ppm soil available P was found to sustain adequate P supply to palms. Boron is found to be a limiting element, particularly in the north-eastern region, leading to Crown Choke disorder in the palm which is corrected by judicious application of boron. The growth of young palms and yields of bearing palms were not affected when 50 per cent of K requirement was replaced by sodium chloride (common salt). Limited organic farming with leguminous green manure crop in the coconut manuring circle is an encouraging practice for improving the fertility and nitrogen use efficiency. Coconut based high density cropping systems are found to require proportionately lower quantities of mineral fertilisers.
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    Performance of coconut based cropping systems for sustainable productivity under Coastal Ecosystem of Andhra Pradesh
    (2004-12) Rao, D.V.R.; Kalpana, M.; Srinivasulu, B.; Khan, H.H.
    Two coconut based multispecies cropping systems consisting of Model-I (Coconut + Cinnamon + Pepper + Cocoa + Banana + Pineapple + E.F.Yam + Colocasia + Turmeric) and Model-II (Coconut + Pepper + Banana + Pineapple + E.F.Yam + colocasia + Turmeric) were evaluated comparing with coconut monocropping system (Model-III) for coconut yield, nut quality and sustained productivity and economic viability for four consecutive years (1999-2003) at ARS, Ambajipeta. Data on mean nut yield/palm/year revealed that the highest yields were registered by the palms of Model-I (102.7 nut/palm/ year) followed by Model-II (96.47 nut/palm/year) compared to only 7 1.14 nut/palm/year in Model-III (monocropping) accounting for an yield increase of 35.60 to 44.36 per cent. Data on annual nut yield exhibited a gradual increase year after year from 1999- 2000 up to 2002-03 indicating the sustainability of the cropping system. The nut yield increased, by 27.04 per cent in Model-I and 18.47 per cent in Model-II compared to only 3.63 per cent in Model-III prior to the experimental values. The economic analysis and employment generation studies revealed that the maximum returns and maximum number of mandays/ha/year were obtained from Model-I (Rs.47,589 and 680 mandays) followed by Model-II (Rs. 39,496 and 569 mandays) with Model-III putting up the lowest returns and mandays (Rs. 9,477 and 166 mandays). Considering the monetary returns and sustainability of the coconut yields, cropping system Model-I followed by Model-II were found suitable and these models may be recommended to the coastal ecosystem of AP.