2. Institutional Publications
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Item Thengukrishiykkoru marggarekha /തെങ്ങുകൃഷിക്കൊരു മാർഗ്ഗരേഖ(Kerala Agricultural University, 1993-07) Vahid, P A; Salam, M A; Nair, R RItem Management requirements of overaged rice seedlings(Kerala Agricultural University, 1981) Nair, R R; Kuriakose, T T; Saifudeen, NItem Investigations on phosphate and potash manuring of transplanted rice(Kerala Agricultural University, 1981) Pisharody, P N; Nair, M S; Nair, R R; Seshadrinath, SItem Companion cropping in the rainfed uplands(Kerala Agricultural University, 1979) Thomas, A I; Nair, R RItem Effect of fractional application of lime on the growth and yield of rice (Oryzo saliva L.) in the acidic lateritic loam soil of Pattambi(Kerala Agricultural University, 1974) Gopalakrishnan, R; Pisharody, P N; Nair, R R; Pillai, G RItem Effect of age of seedlings and nitrogen levels on annapurna rice(Kerala Agricultural University, 1975) Pillai, G R; Nair, R R; Pisharody, P N; Gopalakrishnan, RAn investigation was undertaken to study the effect of age of seedlings and nitrogen levels on Annapurna rice at the Rice Research Station, Pattambi, during first and second crop seasons on 1969-70 and 1970-71. The results revealed that the optimum age of seedlings for transplanting was 15 days during first crop season and 20 days during second crop season. Response due to nitrogen was significant only up to 80 Kg N/ha.Item Estimation of loss of major plant nutrients in percolation in rice fields(Kerala Agricultural University, 1976) Nair, R R; Pisharody, P N; Gopalakrishnan, RIn an investigation conducted at the Rice Research Station, Pattambi, it was found that appreciable amounts of nitrogen, phosphorus and potash moved out of the root zone of rice plants in percolating water. The magnitudes of loss of these nutrients through percolation during the autumn and winter seasons of 1973-74 are reported in this paper.Item Response of upland rice to nitrogen as influenced by bulk density of soil(Kerala Agricultural University, 1976) Nair, R R; Pisharody, P N; Pillai, G R; Gopalakrishnan, RItem Influence of applied nitrogen on grain yield, protein content and milling outturn in transplanted rice(Kerala Agricultural University, 1976) Pisharody, P N; Nair, R R; Gopalakrishnan, RIn an investigation conducted at the Rice Research Station, Pattambi using the early duration strain Thriveni as test variety, it was found th it application of a portion of nitrogen as top dressing at panicle initiation and booting stages increased grain yield, protein content and recovery of head rice. Protein content of grain and head rice recovery were observed to be closely related. Higher the protein content, greater was the recovery of head rice. On equal nitrogen basis, sulphur coated urea applied at planting was as effective as split application but significantly superior to ordinary urea when applied entirely at planting.Item Investigations on the effect of heavy manuring of rice seed beds(Kerala Agricultural University, 1977) Nair, R R; Pillai, G R; Pisharody, P N; Gopalakrishnan, RTwo field experiments were conducted at the Rice Research Station, Pattambi on seed bed manuring using IRS and Jaya as test varieties. The first experiment (1969—70, 1970—71) aimed to study whether nitrogen application in the main field (0, 40, 80," 120 kg/ha) could be reduced by phosphate manuring (0, 30, 60, 90 kg/ha) of the seed bed. The results showed that response to nitrogen was independent of the dose of phosphours applied in the seed bed. The effect of nitrogen (0, 40, 80 kg/ha) phosphorus (0, 25, 50 kg/ha) and potash (0, 25, 50 kg/ha) individually and in factorial combinations, on the productivity of rice seedlings was investigated in tde second experiment (1970- 71, 1971—72). The results conclusivly proved that applied nutrients had no significant influence on grain yield.