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Item IIHR 61-B, a high yielding vegetable type of cowpea(Kerala Agricultural University, 1991) Neema, V P; Bridgit, T K; James, K I; Nair, N RItem Effect of chemical and integrated weed management in upland rice(Kerala Agricultural University, 1993) Kamalam Joseph; Bridgit, T KAn experiment was conducted to study the effect of different weed management practices in upland rice in Kerala. The average reduction in grain yield due to weed competition was 44 per cent in 1988 and 56 per cent in 1989. During both the years weed free plots recorded grain yield on par with pre-emergence butachlor + 2,4-D at 25 to 30 days after rice emergence (DARE), pre-emergence pendimethalin and pre-emergence pendimethalin followed by either hand weeding once or 2,4-D application at 25 to 30 DARE. Weed control achieved by preemergence application of pendimelhalin followed by either a post emergence application of 2,4-D or hand weeding once was as effective as maintaining weed free condition throughout the crop growth. Weed control efficiency was higher in the case of pendimathalin when compared to thiobencarb and butachlor.Item Response of cowpea genotypes to dates of sowing(Kerala Agricultural University, 1993) Bridgit, T K; Neema, V P; Joy, P PItem Integration of organic and inorganic nutrient sources in transplanted lowland rice(Kerala Agricultural University, 1994) Jose Mathew; Bridgit, T K; Kamalam JosephItem Nutrient requirement of rice under Koottumundakan system(Kerala Agricultural University, 1994) Bridgit, T K; Jose Mathew; Kamalam JosephItem Effect of modified urea forms on the performance of wet-seeded rice in acid laterite soils(Kerala Agricultural University, 1996) Bridgit, T K; Jose mathew; Sivakumar, CField studies were conducted at the Regional Agricultural Research Station. Pattambi for three dry seasons during 1991 to 1993 tu evaluate the efficiency of modified urea forms in wet-seeded rice under puddled condition. The results indicated the remarkable response of wet-seeded rice to new urea forms over prilled urea in respect of growth, yield attributes and yield and N use efficiency. Split application on nimin coated urea (NCU) and inussorie rock phosphate coated urea (MRPU) recorded significant yield improvement over prilled urea (PU) and large granule urea (LGU) applied either fully as basal or in split doses.Item Effect of cultural management on root characteristics and productivity of rice in laterite soil(Kerala Agricultural University, Vellanikara, 2002) Bridgit, T K; Potty, N NItem Effect of cultural management on yield and yield attributes of rice in laterite soil(Kerala Agricultural University, Vellanikara, 2002) Bridgit, T K; Potty, N NStudies conducted to analyse the pathway of yield formation as influenced by varying cultural management systems in laterite soils revealed that depth of digging at 15 cm or 30 cm or increasing the levels of farm yard manure beyond 5 t ha"1 had only marginal effects on improving the growth and productivity of the plant. Crops under dry seeded condition which did not have reduced soil environment in the early stage manifested better growth as evidenced by higher elongation and more tillers with a steady declining tiller count. Larger numbers of longer roots were another characteristic. As against this, the plants in the reduced environment were comparatively dwarf, tiller production was low but extended beyond maximum tillering and panicle initiation stages and root production was also hindered. The variation in these characters between the two environments worked out to be 46.0 per cent in tiller count and 43.9 per cent in root count. This difference was manifested in the yield levels of 6496 kg ha"1 in dry seeded and 4715 and 4615 in wet seeded and transplanted situations.