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    Effect of moisture regime and phosphatic fertilizer application on the growth and yield of winter rice
    (Kerala Agricultural University, 1988) Mandal, B K; Ghosh, K G
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    Evaluation of different methods for reducing percolation loss of water in rice fields
    (Kerala Agricultural University, 1983) George, T P; Balakumaran, K N; Jose Mathew; Sushama, P K; Pillai, G R; Kuruvilla Varghese
    Afield experiment was conducted in a sandy loam soil of the Agronomic Research Station, Chalakudy for five years (1974-'80 to study the efficiency of puddling with different implements (power tiller, country plough and wetland puddler), soil dressing with lateritic,loam and sub-soil compaction at 30 cm depth in reducing percolation loss in rice fields. The study showed that these methods neither effectively reduced the water loss nor influenced the grain yield.
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    Response of winter rice to different water regimes and nitrogen levels
    (Kerala Agricultural University, 1990) Jose Mathew; Kuruvilla Varghese; Pillai, G R; Santhakumari, G
    A sutudy was conducted at the Agrnomic Research Station, Chalakudy for three consecutive winter (second crop) seasons from 1983-84 to 1985-86 to study the effect of different water regimes and nitrogen levels on the growhth and yield of short duration rice variety Triveni. Four water regimes (continuous submergence of 5±2 cm and 7
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    Performance of medium duration rice as influenced by plant population and fertilizer levels
    (Kerala Agricultural University, 1991) Sreedevi, P; Sreedharan, C
    In a few trials conducted at the Regional Agricultural Research Station, Pattambi, Kerala to assess the performance of IR 42 - a low fertilizer responsive rice variety - under different plant population and fertilizer management situations, it was found that the variety has the built-in ability to tolerate low fertility and at the same time respond to higher fertilizer doses than the recommended dose of 90 kg N, 45 kg P2Os and 45 kg K.iO/ha. The optimum plant population was found to be 33 hills/m . The highest net return and benefit cost ratio were associated with a plant population of 33 hills/m at full dose of fertilizer. But the return per rupee invested on fertilizer was more with 33 hills/m in the first crop season and with 25 hills/m in the second crop season at 50 per cent of the recommended dose of fertilizer.