Browsing by Author "Nagawekar, D.D."

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    Performance of Spice Crop as Intercrops in Coconut Plantation Under Konkan Condition
    (2007-02) Nagawekar, D.D.; Khan, H.H.; Magdum, M.B.; Joshi, G.D.; Desai, A.G.
    The spice crop viz nutmeg, cinnamon, clove and black pepper have been planted in coconut plantation as intercrops. After planting these intercrops the yield of coconut was found to increase between 24 to 94 per cent as compared to the previous year yield. Among these different spice inter crops the nutmeg exhibited the most promising performance. Nutmeg alone and nutmeg + coconut mixed crops recorded the maximum net returns of Rs. 10,350/-per ha. and Rs. 82,355/- per ha. respectively followed by cinnamon + coconut Rs. 62,475/- per ha. and Black pepper + coconut Rs. 39,898/- per ha. The coconut monocrop alone recorded nut return of 30,475/- per ha.
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    Stability Of Coconut Yield In Coordinated Multi Location Trials
    (2002) Khan, H.H.; Parthasarathy, V.A.; Nampoothiri, K.U.K.; Natrajan, C.; Giridharan, S.; Suresh, S.; Nagawekar, D.D.; Prasanna Kumar; Reddy, R.V.K.S.; Nambiar, P.T.N.; Arunachalam, V.; EIangovan, M.
    Stability of coconut yield of different varieties in divergentjagro-climatic conditions helps to boost the productivity over a range of environment. The average annual nut yield of six varieties at three locations under the All India Coordinated Research Project on Palms centers viz., Ambajipeta (Andhra Pradesh), Ratnagiri (Maharashtra) and Veppankulam (Tamil Nadu) was analysed for G x E interaction. Seven years yield data between 1992-93 and 1999-2000 was analysed for this study. Eberhart and Russels model and Perkins and Jinks method was used to analyse the data and interpret the results. Laccadive Ordinary had shown maximum yield (105.08 nuts/palm/year) with high variance (2225.50). It could perform well in input Intensive cultures. Fiji has shown good yield (88.72 nuts/palm/year) with (bi=0.77) good stable performance. Andaman Ordinary has recorded low (67.70 nuts/palm/year) but steady (bi=1.05) yields. Hence, they could be useful In input deficient situation. Cochin China was found to be a non-performer. All the varieties were tested with good input management.Their interaction with environment has brought out the hidden genetic potential.
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    Variations in nut yield of coconut and dry spell in different agro-climatic zones of lndia
    (2007-09) Naresh Kumar, S.; Rajagopal, V.; Siju Thomas, T.; Vinu K. Cherian; Ratheesh Narayanan, M.K.; Ananda, K.S.; Nagawekar, D.D.; Hanumanthappa, M.; Vincent, S.; Srinivasulu, B.
    Coconut is the major perennial crop in coastal areas of lndia. It is mainly grown under rainfed conditions in areas of high rainfall. However, these plantations face summer drought situations as the rainfall distribution is restricted to only 4 to 5 months a year, leaving remaining period as dry. The objective of the study is to quantify the dry spell and to deduce the influence of rainfall and dry spell on the nut yield in major coconut growing areas situated in different agro-climatic zones of India. viz., western coastal area - hot sub-humid per-humid (represented by Kasaragod in Kerala and Ratnagiri in Maharashtra), Western Ghats - hot sub-humid per-humid (represented by Kidu in Karnataka); hot semi-arid (represented by Arsikere in Karnataka); and eastern coastal plains - hot subhumid (represented by Veppankulam in Tamil Nadu and Ambajipeta in Andhra Pradesh). Variation in annual rainfall was from a maximum of 3337.7 mm (Kasaragod) to a minimum of 718.23 mm (Arsikere). Dry spell was longer in Ratnagiri (216 days) and Arsikere (202 days), and shorter at Kidu (146 days). The annual nut yield under rainfed conditions varied from 68 (Ambajipeta) and 66 (Kasaragod) to 41 (Arisekere) and 30 (Kidu). Impact of variations in dry spell on nut yield was discernible from the study. In view of the long duration (44 months) between the inflorescence initiation to nut maturation, the occurrence of dry spell in any one year would affect the yield for the subsequent three to four years. It can be inferred that the longer dry spell affects the nut yield for next four years to follow with stronger impact on fourth year, irrespective of the total rainfall.