Browsing by Author "Venkitaswamy, R."
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Item Effect of graded levels of NPK on the reproductive characters and yield of hybrid coconut CODx WCT(2009-01) Venkitaswamy, R.; Hameed Khan, H.; Palaniswami, C.Item Effect of long term application of graded levels of NPK fertilizers on soil and leaf micronutient status of hybrid coconut(2006) Venkitaswamy, R.; Hameed Khan, H.; Poongothai, S.Item Integrated Nutrient Management in Coconut(2002-12) Venkitaswamy, R.; Hameed Khan, H.A fieid experiment was conducted in the farmers field near Coconut Research Station, Aliyamagar from 1996-2001 to study the effect of various organic manures in coconut. The treatment comprised of farmers practice, 100 % of recommended dose of chemical fertilizers (560: 320:1200 g NP10sK10/palm/year), 100% nutrient supply (on N basis) as composted coir pith, 50% of nutrient supply (on N basis) as composted coir pith + 50 % through chemical fertilizers and Neem cake (10 kg/palm/year) + bone meal (2 kg/palm/yead+ ash (20 kg/palm/year). The results of the study from 1997-98 to 2000-2001 revealed that application of composted coir pith on 100 % N basis per palm/year or application of 50 % of composted coir pith on N basis with 50 % of recommended dose of chemical fertilizers per palm peryear (280: 160: 600 g NPPsKp/palm/year) recorded maximum mean nut yield of 151 and 148 nuts/palm/year respectively. Composted coir pith treatment recorded more leaf N and K content of 2.07 and 1.55 % respectively in the 14th leaf. Hundred per cent composted coir pith and 50 % composted coir pith + 50 % of the recommended dose of fertilizers treatments have recorded more net income and benefit cost ratio of Rs.39350, 37988 and 2.05, 2.00 respectively.Item Micro Irrigation for Hybrid Coconut(2007-02) Venkitaswamy, R.; Hameed Khan, H.A field experiment was conducted in red sandy loam soil at TNAU Agricultural Research Station, Aliyamagar to find out the water requirement for coconut through drip irrigation with Hybrid VHC-2.The drip system included 4 drippers placed 1 meter away from palm operated at discharge rate of 8 litres of water per hour.The system operated throughout the year except the period of rainfall under Aliyamagar conditions. The data collected from 1996-97 to 1998-99 revealed that drip irrigation equal to 100% of Pan evaporation (Eo) and basin irrigation at IW/CPE ratio of 1.0 at 4 cm depth recorded higher nut yields. The average nut yields for three years with drip at 100% Eo was on par with basin irrigation at IW/CPE ratio of 1.0 at 4 cm depth.The leaf N status was better with drip irrigation at 100% Eo and basin irrigation compared to life saving irrigation treatment. The soil available N and K did not reveal any significant variation due to irrigation treatments. However, available phosphorus status was found to decrease with increasing dose of irrigation through drips. The cost of production of nuts during 1998-99 indicated that the production cost was low with basin irrigation and drip irrigation at 100 % Eo (i.e) Rs.1.99 and 2.02 respectively.Item Trends in weather and yield changes in past in coconut growing areas in India(2009-06) Naresh Kumar, S.; Rajeev, M.S.; Vinayan; Nagvekar, D.D.; Venkitaswamy, R.; Raghava Rao, D.V.; Boraiah, B.; Gawankar, M.S.; Dhanapal, R.; Patil, D.V.; Kasturi Bai, K.V.