Browsing by Author "Sreedharan, C"

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Agroforestry measures for soil conservation in hill slope
(Department of Agronomy, College of Horticulture, Vellanikkara, 1989) Ali, P; Sreedharan, C
An experiment on 'Agroforestry measures for soil conservation in hill slope' was conducted at the Instructional Farm, College of Horticulture, Vellanikkara for a period of one year from June 1987 to May 1988. The main objectives of the experiment were to quantify the run-off, soil and nutrient losses as influenced by different agroforestry practices and to evolve economically and ecologically viable agroforestry measures for soil conservation
Agrotechniques for soil conservation in taungya systems
(Department of Agronomy, College of Horticulture, Vellanikkara, 1986) Gopinathan, R; Sreedharan, C
An experiment on 'Agrotechniques for soil conservation in taungya systems' was conducted at the Instructional Farm, College of Horticulture, Vellanikkara for a period of two years from May 1984 to April 1986. The objectives of the experiment were to asses the run-off, soil and nutrient losses as influenced by the important taungya practices and to evolve economically and ecologically viable agroforestry measures for soil conservation. Eucalyptus , the main tree component , was intercropped with the usually cultivated taungya crops of cassava and rice . The efficiency of cassava planting on ridges, grass farming and grass stripping was also investigated. There were seven treatments replicated thrice in RBD. Daily run-off and soil loss were quantified by installing multi-slot device consisting of 47 slots and brick masonry settling tank specifically designed for the project.
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
Crude protein and crude fibre content of fodder grasses as influenced by legume intercropping and phosphorus application
(Kerala Agricultural University, 1982) Chandini, S; Raghavan Pillai, G; Sreedharan, C
Effect of Calcium, Potassium and Magnesium on growth, yield and shelling percentage of groundnut in red loam soils of Kerala
(Kerala Agricultural University, Vellanikara, 1968) Sreedharan, C; George, C M
Effect of cover crops on nutrient dynamics in the rubber plantations
(Department of Agronomy, College of Agriculture, Vellayani, 1995) Prathapan, K; Sreedharan, C
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.
Effect of micronutrients on paddy in a red loam soil of Kerala
(Kerala Agricultural University, Vellanikara, 1969) Sreedharan, C; George, C M
Effect of nitrogen and lime on the yield attributes and yield of dinanath grass (Pennisetum pedicallatum Trin.)
(Kerala Agricultural University, 1980) Abraham, C T; Raghavan Pillai, G; Sreedharan, C
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.
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.
Effect of NPK on seed progeny and air layers in cashew ( Anacardium occidentale L. )
(Department of agronomy, College of Agriculture Vellayani , Trivandrum, 1985) Harishu Kumar, P; Sreedharan, C
Effect of nutrition as Influenced by irrigation on growth and yield of oil palm (Elaeis guineensis Jacq)
(Department of Agronomy, College of Agriculture, Vellayani, 1994) Thomas Varghese, P; Sreedharan, C
Effect of phosphorus and lime application on rice variety-I. R. 8
(Kerala Agricultural University, 1977) Suseelan, P; George, C M; Sreedharan, C
Effect of potash on cotton
(Kerala Agricultural University, Vellanikara, 1968) Sreedharan, C; Mariakulandai, A
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.
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.
Efficiency of azolla for weed control in rice ecosystem
(Department of Agronomy, College of Agriculture, Vellayani, 1984) Madhava Chandran, K; Sreedharan, C
An experiment was conducted in sandy soils of the Agronomic Research Station, Chalakudy during the first crop season (Kharif) of 1982. The efficiency of azolla for weed control in rice ecosystem was investigated in order to find out a suitable alternative to the traditional weed control methods used in rice culture
Evaluation of lowcost agronomic techniques for sustained rice production
(Department of Agronomy, College of Horticulture, Vellenikkara, 1985) Sreedevi, P; Sreedharan, C
Three field experiments were conducted at the Regional Agricultural Research Station, Pattambi, Kerala to evaluate some of the low cost agronomic techniques for sustained rice production during the period from 1982 to 1985. In the first experiment the performance of IR 42, a rice variety suited to low fertility conditions was assessed under varying levels of nutrition and spacing. Fertilizer, age of seedlings and planting density, for IR 42 were the experimental variables for the second experiment. In the third trial, azolla was evaluated as a low cost biofertilizer for IR 42. The first and third trials were laid out in split plot design while the second trial in factorial RBD. The rice cultivar IR 42 proved its mettle under the low fertility conditions. In fact, it gave an average yield of 2.78 t ha-1 in virippu and 2.32 t ha-1 in mundakan without any fertilizer application. A plant population of 33 hills m-2 (spacing 20 x 15 cm) in conjunction with full dose of fertilizer of 90 : 45 :45 kg NPK ha-1 recorded substantially more grain yield of 4.24 and 3.20 t ha-1 in virippu and mundakan seasons, respectively. Relatively lower grain and straw yields were registered by the treatment 100 hills m-2 (spacing 20 x 5 cm) at all levels of fertilizer application. The net return and benefit cost ratio were more in the former combination. Increasing the seedling number hill-1 from two to four or six was also found to be beneficial for this variety. At lower levels of fertilizer six seedlings hill-1 recorded higher grain yields. However, at higher levels four seedlings hill-1 was found to be superior. During virippu season planting of 35 days old seedlings was found to perform better compared to 30 and 25 days old seedlings whereas in mundakan season, 30 days old seedlings were found preferable in terms of grain yield. Recommended dose of fertilizers (90 : 45 : 45 kg NPK ha-1) with azolla @ 10 t ha-1 and 75 per cent of the same with azolla @ 15 t ha-1 recorded similar grain yields indicating that an extra dose of 5 t of azolla ha-1 could substantially reduce the chemical fertilizer requirement and save as much as 25 per cent of the fertilizer. The benefit cost ratios were almost equal in both the combinations while the return per rupee invested was more in the latter combination. The finding appears to caution against excessive use of azolla expecting better exploitation of all the benefits attributed to it. Nevertheless, data on the residual fertility of the soil after each crop indicate that residual fertility was higher in the plots receiving full dose of fertilizer along with the highest level of azolla, 20 t ha-1
Evaluation of sequential and mixed row intercropping in cassava
(Kerala Agricultural University, 1987) Asokan, P K; Sreedharan, C
The prospectus of sequential intercropping of cassava, planted in paired row with groundnut/cowpea and mixed row intercropping with groundnut+redgram was studied in a field trial. Groundnut and cowpea was successful as a Kharif intercrop. The Rabi intercrops sown in sequence to Kharif intercrop failed to give economic yield. Mixed row intercropping of cassava with groundnut + redgram gave the highest benefit : cost ratio followed by cassava+groundnut. None of the intercrops affected the cassava yield.