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Author: search.filters.author.Sukumaran Nair, SHas files: Yes

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    On the occurrence of seedling blight in the drybed rice nursery in Kuttanad
    (Kerala Agricultural University, 1975) Vergis, P C; Sukumaran Nair, S; Tomy, P J
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    Field evaluation of certain proprietory fungicides against sheath blight of paddy
    (Kerala Agricultural University, 1979) Rajan, K M; Sukumaran Nair, S; Varadarajan Nair, P
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    Performance of sugarcane varieties in Kerala
    (Kerala Agricultural University, 1982) Nair, P K C; Sukumaran Nair, S; Namboodiri, K M N
    With a view to evolving cane varieties superior to the local promising ones under cultivation in the river bank areas of Kerala, a varietal trial with 12 varieties was conducted at the Sugarcane Research Station, Thiru valla during the year 1977-79. Co. 62175 excelled all other varieties in germination in the plant crop, but not in the ratoon crops. Co. 997 is found to be better than other varieties in number of mi liable canes. But this number has contributed for yield. Co, 62175 is the highest yielder among the twelve varieties studied. The increase in yield over the most popular variety Co. 997 is 45. 4%, 22%, 32.4% for the plant crop, first ratoon, second ratoon respectively. The mean percentage increase over all the seasons is 37.6%. The increase in cane yield of this variety is due to the increased length and girth of canes. There is no significant difference in Brix, Pol and purity between the varieties. Co. 62175 can be recommended for commercial cultivation on the river banks of Kerala.
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    Lodging of sugarcane and its influence on yield and quality of certain cultivars
    (Kerala Agricultural University, 1982) Sukumaran Nair, S; Mathew Jacob, K; Chellappan Nair, P K
    In order to estimate the loss in weight and recovery of sugar in the lodged crop of sugarcane a study was conducted at the Sugarcane Research Station, Thiru valla, Kerala during 1980-81. The length of canes, number of mi liable canes, weight and recovery of sugar were found to be reduced as the canes lodge. The loss in weight ranged from 10.16% to 18.95% for half lodged canes and 30-81% to 38.71% in full lodged canes. The loss in cane sugar varied from 33.84$ to 43,48# when the cane lodged completely. This phenomenon was more in fully lodged canes when compared with half lodged canes. It is therefore evident that lodging of sugarcane is one of the factors which decrease the production of cane and sugar.
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    Variability and correlations in sugarcane hybrids for economic attributes
    (Kerala Agricultural University, 1986) Alice Antony; Manikantan Nair, P; Sukumaran Nair, S
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    Keeping quality of sugarcane setts of the popular varieties of Kerala
    (Kerala Agricultural University, 1983) Sukumaran Nair, S; Mathew Jacob, K; Nair, P K C
    In order to estimate the loss in weight of seed cane, viability of buds during storage and germination of viable buds, a study was taken up at the Sugarcane Research Station, Thiru valla during 1980-81 planting season, with four popular varieties of the tract. The maximum loss in weight was recorded in the variety Co-997 during storage upto 30 days and the loss in weight was rapid after 25 days of storage in the varieties Co 997 and Co. 785. This loss in weight is important when the seed materials are supplied to the cane growers in weight basis. The buds in the four varieties studied remained viable to a fair degree upto 1 5 days after the collection of the setts and thereafter the vaibility was reduced drastically. This loss was maximum in the variety Co 449 and minimum in Co-62175. Co 62175 showed the maximum tendency for pre-germination of buds in storage and such behaviour was minimum in Co 449. Considering the loss in weight of the seed cane, loss in viability and germination of the buds during varying periods of storages, the safe margin was found to be 15 days- It is desirable that the setts are planted as early as possible after harvest of the canes.
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    Variability and heritability of yield and quality components in the ratoon crop of sugarcane
    (Kerala Agricultural University, 1990) Sreekumar, S G; Gopinathan Nair, V; Sukumaran Nair, S
    Evaluation of the first ratoon crop of 48 hybrid sugarcane varieties in RED with three replications at the Sugarcane Research Station, Thiruvalla revealed that certain characters viz., germination count on the 45th day, shoot count on the 180th day, number of millable canes per plot and cane yield per plot had high genotypic coefficient or variation, heritability in the broad sense and genetic advance. Hence they are amenable to genetic improvement through selection and may be considered as dependable selection criteria for the improvement of cane and sugar yields in the first ratoon crop of sugarcane.