2. Institutional Publications

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Author: search.filters.author.Sreedharan, C

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    Grain shattering in rice as influenced by Agro-climatological factors
    (Kerala Agricultural University, 1976) Sreedharan, C; Vamadevan, V K
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    Effect of split doses and time of nitrogen application on growth, yield attributes and yield of direct sown rice in puddled soil
    (Kerala Agricultural University, 1979) Balachandran Nair, C K; Sreedharan, C; Sasidhar, V K
    The result showed that at harvest there was no significant difference between treatments suggesting that the plant height was made up by the nitrogen supplied at larer stages. The treatment receiving half nitrogen at active tillering and the other half at panicle initiation stage recorded the maximum panicles/m2. Nitrogen application at later stages especially giving half at panicle initiation has resulted in maximum panicle weight and 1000 grain weight. Skipping basal application of nitrogen and applying half at active tillering and the other half at panicle initiation stage has given the maximum grain yield of 4874 kg/ha.
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    Effect of nitrogen and phosphorus on asiriya mwitunde groundnut in Kerala
    (Kerala Agricultural University, 1975) Jayadevan, R; Sreedharan, C
    An experiment was conducted to assess the high fertilizer responsiveness of Asiriya Mwitunde, a groundnut variety introduced from Tanganiyaka in respect of N and P under the soil and climatic conditions of Kerala. The various growth characters such as height, leaf and haulm production were significantly increased by 30 kg N/ha. Application of P upto 100 kg/ha increased significantly the yield attributes such as weight of kernels, test weight, shelling percentage in this variety. Pod yield was significantly increased by 20 kg N and 75 kg P giving a per hectare yield of about 2969 kg/ha under the agro-climatic conditions of Kerala.
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    Effect of nitrogen and phosphorus on asiriya mwitunde groundnut in Kerala
    (Kerala Agricultural University, 1975) Jayadevan, R; Sreedharan, C
    An investigation was conducted at. the Agricultural College Farm, Vellayani to study the effect of graded doses of N and P on nodulation, protenin and oil content of Asiriya Mwitunde, a newly introduced high yielding variety of groundnut from Tanganiyaka. The number and weight of nodules were significantly reduced by, nitrogen at all stages. Whereas phosphorus application had significantly increased the same at al! levels and stages. Maximum number and weight of nodules were recorded at the 60th day after sowing, Protein content of this variety w.i; significantly increased by nitrogen and phosphorus and a maximum protein content of 29.8 percent was recorded by the treatment combination 30 kg nitrogen and 100 kg phosphorus per hectare. The oil content of the crop was significantly reduced by N application while the same was significantly enhanced by P dressing. The treatment combination of 10 kg N and 100kg P had recorded the highest oil content of 51.6 per cent in this variety.
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    Influence of climatological factors on evapotranspiration (Et) of rice
    (Kerala Agricultural University, 1976) Sreedharan, C; Vamadevan, V K
    It is concluded that if weather records are used to estimate evapotranspiration, solar radiation, air temperature, pan evaporation and wind velocity should be taken into consideratation. Out of these, solar radiation and air temperature are the most important factors which influence ET in this locality.
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    Effect of split doses and times of nitrogen application on the content uptake and utilisation efficiency for direct sown rice in puddled soil
    (Kerala Agricultural University, 1977) Balachandran Nair, G K; Sreedharan, C
    A field experiment conducted to study the effect of split dose and times of N application on N uptake and utilisation efficiency showed ' that the skipping basal application of N and applying half at active tillering and the other luiif at panicle initiation stages gave maximum grain yield for direct sown rice in puddled soil. This was made possible by a higher total N uptake and a higher incremental N uptake contributting to grain yield.
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    Comparative performance of two rice varieties (IR 8 & PTB-9) with varying levels of seed rate and nitrogen under semi-dry conditions
    (Kerala Agricultural University, 1978) Poulose, K C; George, C M; Sreedharan, C; Sasidhar, V K
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    Effect of levels and time of application of potash on growth and yield of tapioca
    (Kerala Agricultural University, 1978) Asokan, P K; Sreedharan, C
    A field experiment was conducted to study the effect of different levels and time of application of K in conjuction with farm yard manure in tapioca variety H—97. The results indicated that maximum tuber yield was obtained at 112.5 kg level of K. Three split application had given better response at lower levels of K. Farm yard manure application had given a better response at higher levels of K. Utilisation index showed a decrease after 75 kg level of K.
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    Studies on the uptake pattern of phosphorus by rice under graded doses of phosphorus in conjunction with lime
    (Kerala Agricultural University, 1978) Suseelan, P; George, C M; Sreedharan, C
    An experiment was laid out in the sandy clay loam soils of the Agricultural College, Vellayani, Kerala during the first crop (Virippu) season of 1968 to study the uptake pattern of phosphorus by rice under graded doses of phosphorus in conjunction with lime using the rice variety I.R.8. The treatments consisted of 4 levels of phosphorus (0, 50, 100 and 150 kg P205/ha, respectively) and two levels of lime (0 and 3273 kg slaked lime/ha, respectively) laid out in randomised block design replicated four times. There was significant increase, in the uptake of phosphorus by the plant with increasing levels of phosphorus whether applied alone or in conjunction with lime. The pattern of phosphorus absorption showed an increasing trend upto the primordia initiation stage, followed by a gradual depression thereafter. Application of lime has favourably influenced the uptake of phosphorus at all stages of growth.
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    Scope for using tapioca leaves as fodder
    (Kerala Agricultural University, 1978) Ashokan, P K; Sreedharan, C