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Articles by S. Ramesh
Total Records ( 5 ) for S. Ramesh
  S. Ramesh and B. Chandrasekaran
  Field experiments were conducted during the Kharif season 2002 and 2003 at wetland research farm of Tamil Nadu Agricultural University, Coimbatore with the objective of developing suitable and efficient crop establishment techniques and to optimize the nutrient management strategy for rice hybrid ADTRH1. The experiments were laid out in split plot design replicated thrice with four crop establishment techniques in the main plot and seven N management practices were assigned in the sub-plots. The results revealed that the Leaf Nitrogen Concentration (LNC) was not significantly influenced by the crop establishment methods. Wet seeded rice crop registered earlier flowering of seven days as compared to the transplanted crop. Nitrogen use efficiency recorded significantly higher value by the seeding through all the holes (M2) and it was on par with transplanting (M1) and seeding through one out of two holes (M3). Application of N based on Soil Test Crop Response (STCR) for a yield target of 7 t ha-1 registered significantly higher leaf nitrogen concentration and was comparable with N application in four splits plus green manure application @ 6.25 t ha-1. The Nitrogen use efficiency was significantly higher with the N application based on Leaf Colour Chart (LCC) cv.4 whereas least NUE was registered with STCR based N application as compared to rest of treatments. The N management exerted significant variation in days to 50% flowering in both the years. Maximum number of days to 50% flowering was noticed with STCR based N application and minimum number of days was invariably noticed in control. The crop establishment methods did not cause significant variation in the quality parameters of hybrid rice. Significantly higher protein content was recorded with N application based on STCR and it was comparable with green manure 6.25 t ha-1 plus N application in four splits. Application of 100% N as organic manures recorded significantly higher amylase 27.20% and the lowest amylase content was observed in N application based on STCR.
  R. Gobi , S. Ramesh , B.J. Pandian , B. Chandrasekaran and T. Sampathkumar
  A field experiment was conducted to study the effect of crop density, establishment methods and split application of N and K on growth and yield of hybrid rice CoRH2 during late Pishanam season (November 2001-April 2002) at Agricultural College and Research Institute, Killikulam in Tambaraparani command area. The experiment was laid out in factorial randomized block design with seven treatments replicated thrice. The treatments consisted of two establishment methods, two plant densities and three methods of split application of N and K. The results revealed significant increase in growth attributes of hybrid rice CoRH2 in seedling broadcasting with 40 hills m-2 viz., taller plants, higher DMP, more number of tiller hill-1 and higher LAI, CGR and yield parameters viz., productive tillers m-1, panicle length, panicle weight, thousand grain weight, number of filled grains panicle-1 and registered higher grain and straw yield of 7206 and 8870 kg ha-1, respectively. With regard to split application of N and K, five splits of N and four splits of K exhibited significantly increased values of growth and yield components and recorded significantly superior grain yield of 6967 kg ha-1.The treatment combination of seedling broadcasting of 40 hills m-2 with five splits of N and four splits of K application registered significantly higher growth and yield parameters, which in turn exhibited higher rice grain yield of 7316 kg ha-1 and maximum net return of Rs. 46,170 ha-1 and the highest B:C ratio of 4.08. Minimum number of man days was utilized with seedling broadcasting of 50 hills m-2 with three splits of N and two splits of K. Energy use was significantly higher under seedling broadcasting with 40 hills m-2 and three splits of N and two splits of K.
  M. Vijayakumar , S. Ramesh , N.K. Prabhakaran , P. Subbian and B. Chandrasekaran
  Field experiment was conducted during dry season of 2003 at Tamil Nadu Agricultural University Farm, Coimbatore to study the effect system of rice intensification (SRI) practices on growth characters and growth analysis of rice. The experiment replicated thrice was laid out in randomized block design. The treatment combination of 14 days old seedlings planted at 25x25 cm spacing+water saving irrigation and SRI weeding significantly recorded taller plants (109 cm), total dry matter production (12012 kg ha-1) and LAI (7.69). However, the tiller density per m2 was significantly recorded higher (624) in the treatment combination of 14 days old seedlings+15x10 cm spacing+water saving irrigation+conventional weeding. During wet season the number of days to first flowering (85 DAS) was significantly recorded in the treatment combination of 14 days old seedlings planted at 20x20 cm spacing+conventional irrigation, weeding and nitrogen while during dry season (2003) the combination of seedlings from dapog nursery (14 days old) planted at a spacing of 15x10 cm under limited irrigation of 2 cm on hair-line crack development+conventional weeding significantly recorded days to first flowering (80 DAS). Between panicle initiation (PI) to flowering (FL) and between FL to maturity stage the CGR, RGR and NAR were significantly increased by the treatment combination of 14 days old seedlings, wider spacing of 25x25 cm, limited irrigation of 2 cm with incorporation of weeds and disturbing the soil through SRI weeding using rotary weeder.
  S. Ramesh and A. Krishnan
  Power engineers have the responsibility to deliver economically, adequate and quality power to the consumers. In order to achieve this, the power system must be maintained at the desired operating level by suitable modern control strategies. The controlling of power system is becoming increasingly more complex due to large interconnections. The load frequency control is very important in power system operation and control for supplying sufficient and reliable electric power with good quality. This study deals with the application of real coded genetic algorithm for optimizing the gain of a proportional integral controller for load frequency control of interconnected power systems. Non-linearities such as Governor Dead Band (GDB) and Generation Rate Constraints (GRC) for a two-area reheat thermal power system have been included. Floating point representation has been used, since it is more consistent, more precise and leads to faster convergence. The simulation results confirm the designed control performance of the proposed controller.
  S. Manoharan , S. Ramesh , M. Parthiban , A. Koteeswaran , N.D.J. Chandran and M. Ranga Reddy
  A trial was undertaken in 99 numbers of white leghorn layer parent stock to study the indirect effect of stresroak (a poly herbal feed additive) on overall chick quality improvement, seven day mortality and maternal antibody transfer to chicks. The stresroak feed mix was given @ 2kg per ton of feed and water supplement @ 20ml / day for 100 birds for one month period. The chicks were received two weeks after supplementation at weekly interval for 5 weeks period to assess the chick quality. The results showed that the chick quality scores of the stresroak supplemented groups were highly significantly different from control group (P<0.01). The first week mortality recorded for the three treatment groups revealed a highly significant difference (P<0.01) upon comparison with control group. The maternal antibody against Ranikhet disease in the stresroak supplemented groups showed a highly significant difference (P<0.01) in the transfer of maternal antibody when compared to control group.
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