2. Institutional Publications

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Author: search.filters.author.Vijayagopal, P D

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    Permanent manurial experiment in paddy
    (Kerala Agricultural University, 1979) Vijayagopal, P D; Droupathi Devi, G
    The results of the P. M.E. consisting of treatments receiving organic nitrogen in the form of green leaf or inorganic nitrogen in the form of ammonium sulphate or both and treatments without N, for three successive seasons were reviewed. The results showed that the plots receiving P and K alone gave the lowest y'reld and that P and K failed to show any effect evenafter their discontinuance for 21 continuous seasons. In normal seasons inorganic and organic N were on par as far as grain production was concerned.
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    Role of rain water in the pollination of pepper (Piper nigrum Linn.)
    (Kerala Agricultural University, 1977) Sreekumari Amma; Vijayagopal, P D
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    Nitrogen use efficiency and grain yield of rice
    (Kerala Agricultural University, 1980) Droupathi Devi, G; Vijayagopal, P D; Sasidhar, V K
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    Studies on the fractional application of nitrogen on the yield of rice
    (Kerala Agricultural University, 1980) Droupathi Devi, G; Vijayagopal, P D; Sasidhar, A V K
    The effect of fractional application of nitrogen on the grain yield of two high yielding rice varieties Jaya and Annapurna was studied for six consecutive seasons during 1972-73 to 1974-75 in the Rice Research Station, Mannuthy. Significant results were obtained in two first crop seasons and the treatments receiving 50 kg N as basal and another quantity of 50 kg N in two equal splits given either at booting and heading or at panicle initiation and booting gave maximum grain yield.
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    Effect of levels of nitrogen and spacing on the yield of rice
    (Kerala Agricultural University, 1981) Droupathi Devi, G; Vijayagopal, P D; Sasidhar, V K
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    Sneha, an improved variety of groundnut for uplands
    (Kerala Agricultural University, 2000) Suma Bai, D I; Manju, P; Sverup John; Wilson, D; Gopimony, R; Vijayagopal, P D
    Initial evaluation trials (lETs) were conducted with 18 superior types and 18 extra early segregants from the Fs progenies during 1993. From the lETs, seven high yielding types and nine high yielding, extra early progeny bulks were selected and subjected to CYTs during kharif 1994 and 1995 at the College of Agriculture, Vellayani, Thiruvananthapuram along with check varieties. Two promising types, VGE-551 and 1SKO-8805 with high yield and two cultures, Culture 15 and Culture 18 with high yield and early maturity were advanced to farm trials along with TMV 2 and local check at nine locations in Thiruvananthapuram district during kharif 1996. Culture 15 with high yield and early maturity was recommended for release as Sneha suitable for cultivation in the uplands of Thiruvananthapuram district.
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    Studies of the intervarietal hybrids of Solanum melongena, L.
    (Kerala Agricultural University, 1973) Vijayagopal, P D; Sethumadhavan, P