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Item Reaction of popular varieties and cultures of rice at the nursery stage to brown spot helminthosporium oryzae under natural disease pressure(Kerala Agricultural University, 1976) James Mathew; John Abraham; Gopalan, NItem Studies on the rate and time of top dressing nitrogen for rice 'var. Jaya(Kerala Agricultural University, 1972) Paul Mathew, M; Sadanandan, NItem Screening rice types for salinity tolerance(Kerala Agricultural University, 1979) Tajuddin, E; Chandrasekaran, SItem Comparative efficiency of certain herbicides in rice fields(Kerala Agricultural University, 1978) Droupathi Devi, D; George, T UItem Production potential and economics on seven rice based crop rotations(Kerala Agricultural University, 1978) Balachandran Nair, G K; Sasidhar, V K; Santhakumari, GItem Efficiency of complex fertiliser on rice(Kerala Agricultural University, 1979) Balakrishna Pillai, P; Sasidhar, V K; Vikraman Nair, RItem Tiller emergence in rice and mutation frequency in the different ear categories(Kerala Agricultural University, 1979) Gopinathan Nair, VRice seeds were treated with two doses each of gamma rays and EMS. The tillers on Mj plants were classified according to their node positions. The frequencies of emergence for the various tiller categories were estimated. The M2 generation was raised as M! ear progenies. Chlorophyll mutation frequency and segregation ratio were estimated in the different ear categories. The frequencies of emergence for the various categories of tillers were different. The main shoot developed with the highest frequency followed by the primaries and the secondaries. Tillers in the axils of the coleoptile and the first primary leaf did not normally develop. The frequency of emergence of primary tillers increased upto the fourth and thereafter giadual'y decreased. Early primaries developed more secondaries than later ones. Mutation frequency of the main ear did not differ appreciably from that of primary ears Secondary groups (4) and (5) mutated more frequently than the respective primaries. The segregation ratios for the main ear and primaries were mostly similar. The ratios for the secondaries were higher. This high segregation ratio indicates that secondary ears are derived from smaller number of initial cells.Item Effect of rice varieties on the extent of leaf consumption by caterpillars of Cnaphalorocis medinalis(Kerala Agricultural University, 1974) Das, N M; Nair, M R G KItem Field evaluation of fungicides against Pyricularia oryzae Cav causing rice blast(Kerala Agricultural University, 1974) Varadarajan Nair, P; Tomy, P JItem Protein content of grain as affected by the application of urea and neam coated urea to rice variety – triveni(Kerala Agricultural University, 1974) Abraham, C; Sadanandan, N; Sasidhar, V K