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R. Karthikeyan

Publications (17)

Comparative Efficacy of Tembotrione (420 SC) and their Combination for Diverse Weed Flora in Wide Spaced Sugarcane (Saccharum officinarum L.) Provides Sustainable Weed Management

R. Karthikeyan, S. Radhamani, R. Sathya Priya, C. Bharathi, P. Janaki, R. Balamurugan, T. Saranraj, M. Kandeshwari & R. Sharmila · Journal of Experimental Agriculture International · 2024

Widely spaced sugarcane, which is becoming progressively more popular in tropical India to enable mechanization is seriously threatened by weed invasion. Compatibility of tembotrione 420 SC as a tank mix in sugarcane with surfactant (isoxadifen-ethyl), atrazine, metribuzin, and e...

Open access Research Article 10.9734/jeai/2024/v46i123170

Triketone Derivates of Hydroxyl Phenyl Pyruvate Dioxygenase (HPPD) as Potential Herbicides against Diverse Weed Flora in Maize: Efficacy, Phyto-toxicity, Soil Residual Toxicity Impact on Succeeding Sunflower

R. Karthikeyan, R. Sathya Priya, C. Bharathi, P. Janaki, C. Chinnusamy, M. Kandeshwari, T. Saranraj & R. Balamurugan · International Journal of Plant & Soil Science · 2024

Aim: Field experiments were conducted for two years during 2016-17 to 2017-18 to evaluate the compatibility of tembotrione 420 SC (Laudis) on maize and its residual effect on succeeding crop. Methodology: Randomized complete block design with three replications were used. TNAU ma...

Open access Research Article 10.9734/ijpss/2024/v36i84894

Rapid Urease Test vs Histopathological Examination: A Prospective Study to Compare the Accuracy of Both Tests in the Diagnosis of Helicobacter pylori

R. Karthikeyan & B. S. Sundaravadanan · Journal of Pharmaceutical Research International · 2021

Background: Helicobacter pylori is a gram-negative bacterium that causes chronic gastritis and plays important role in peptic ulcer disease, gastric carcinoma, and gastric lymphoma. The main aim and objective of the study were to study the incidence of H. pylori. To find the effi...

Open access Research Article 10.9734/jpri/2021/v33i49B33369

Effect of Seed Priming with Organic-inputs on Seedling Germination, Seedling growth and Vigour of Fingermillet

G. Soniya, R. Karthikeyan, K. Thirukumaran & M. Gopalakrishnan · International Journal of Environment and Climate Change · 2022

A lab experiment was conducted at Department of Agronomy, Tamilnadu Agricultural University, Coimbatore, Tamilnadu, India. The research study revealed that effect of seed priming treatments with Vermiwash, Cowurine, Panchagavya, Beejamrutha, Jeevamrutha on seed germination, seedl...

Open access Research Article 10.9734/ijecc/2022/v12i1131011

Assessment of Haematological Profiles in Apparently Healthy Male Kombai Dogs in Theni District, Tamil Nadu

B. Deepika, M. Sundara Vinayaki, R. Karthikeyan & Manju G Preedaa · Journal of Advances in Biology & Biotechnology · 2024

The hematological profiles of apparently healthy male Kombai dogs in Theni district was studied in this research. Twelve male Kombai dogs had their cephalic veins venipunctured to obtain blood samples, which were then analysed. Red blood cell count, haematocrit, mean corpuscular...

Open access Research Article 10.9734/jabb/2024/v27i111653

Agro-ecological Alternatives for Fall Armyworm Management in Maize: A Review

R. Sowmiya, R. Krishnan & R. Karthikeyan · International Journal of Environment and Climate Change · 2024

Maize, scientifically known as Zea mays, stands as one of humanity's most vital and versatile crop, with a rich history dating back thousands of years. Its journey from a wild grass to a staple food crop reflects its adaptability and resilience in various climates and soil condit...

Open access Research Article 10.9734/ijecc/2024/v14i84358

Influence of Super Nano Urea and Nano DAP on Growth Parameters of Rice Fallow Cotton under High Density Planting System

E. Mahachandramuki, K. Thirukumaran, R. Karthikeyan, R. Sivakumar, K. M. Sellamuthu & G. Prabukumar · International Journal of Plant & Soil Science · 2023

The experiment was carried out at wetlands farm, Tamil Nadu Agricultural University, Coimbatore, during summer, 2023 in a Randomized block design with ten treatments and replicated thrice. The main objective of this study is to find out the effect of varied dose of basal nitrogen...

Open access Research Article 10.9734/ijpss/2023/v35i193602

Effect of Seed Priming with Various Organic and Inorganic Compounds on Cotton Seed Germination and Seedling Development

R. Kavin Kumar, K. Thirukumaran, R. Karthikeyan & M. R. Latha · International Journal of Plant & Soil Science · 2022

Aims: This study was conducted to evaluate the effects of seed priming with various organic and inorganic compounds on cotton seed germination and seedling development. Study design:  Completely randomized design Place and Duration of Study: The experiment was conducted in Depart...

Open access Research Article 10.9734/ijpss/2022/v34i2231344

Assessment of Suitable Grass and Legume Fodders for the Development of Pastures under Coconut Garden

S. M. Vinodhini, S. D. Sivakumar, R. Karthikeyan & M. Thirunavukkarasu · International Journal of Plant & Soil Science · 2022

Aim: The study was conducted for the evaluation of suitable grass and legume fodders for the development of pastures under coconut garden. Study Design: Randomized Block Design. Place and Duration of Study: The field experiment was carried out in Farmer’s coconut field, Pollachi,...

Open access Research Article 10.9734/ijpss/2022/v34i2131255

Effect of Glyphosate on Physiology and Biochemical Properties of Purple Nutsedge (Cyperus rotundus L.)

K. Srimathi, C. R. Chinnamuthu, R. Karthikeyan, R. Gnanam & A. Lakshmanan · International Journal of Environment and Climate Change · 2022

The study was conducted to understand the influence of herbicide on the changes in physiology and biochemical properties of purple nutsedge weed (Cyperus rotundus L.). Laboratory and pot culture study were conducted at the Department of Agronomy, Tamil Nadu Agricultural Universit...

Open access Research Article 10.9734/ijecc/2022/v12i930757

Impact of Different Sowing Windows and Legume Intercrops on the Incidence of Fall Army Worm (FAW) (Spodoptera frugiperda) and Yield of Hybrid Maize in Western Agro Climatic Zone of Tamil Nadu

R. Sowmiya, R. Krishnan, R. Karthikeyan, S. Jeyarani & C. N. Chandrasekhar · International Journal of Plant & Soil Science · 2022

The present investigation was undertaken during the Kharif and Rabi seasons of 2019 to study the influence of different sowing windows and intercropping of legumes on the level of infestation of fall armyworm on maize crop. Three dates of sowing were adopted in each season and in...

Open access Research Article 10.9734/ijpss/2022/v34i230839

Developing Genetic Coefficients of Sorghum Cultivars Using Gencalc and Glue Genetic Coefficient Estimators in DSSAT

P. Praveenkumar, N. K. Sathyamoorthy, G. A. Dheebakaran, R. Karthikeyan, Jeevanand Palanisamy, S. A. Naveen & S. Sachin · Asian Research Journal of Agriculture · 2023

DSSAT (Decision Support System for Agrotechnology Transfer) is a software system used for crop growth and development, soil and water balance, nutrient cycling, climate change impact simulations and precision agriculture. The objective of this study was to calibrate and validate...

Open access Research Article 10.9734/arja/2023/v16i2385

Enhancing Small Millet Farming Resilience through Conservation Agriculture in Rainfed Regions

K. Sathiya, A. Nirmalakumari, T. S. Sukanya, C. Vanitha, R. Karthikeyan & P. Ayyadurai · Journal of Experimental Agriculture International · 2024

The Centre of Excellence in Millets, located in Athiyandal, Tamil Nadu, conducted an extensive study from kharif 2020 to 2022, focusing on the impact of conservation agriculture practices on small millet crops in rainfed areas. The experiment, designed in a split-plot layout, inc...

Open access Research Article 10.9734/jeai/2024/v46i52357

Effect of Nutrio - Hormonal Consortia on Growth and Yield in Groundnut

Tatiparthi Praisy, R. Sivakumar, D. Vijayalakshmi, R. Sasikala & R. Karthikeyan · International Journal of Environment and Climate Change · 2023

This study addresses a knowledge gap in understanding the interaction effect of nutrient-plant growth regulators on groundnut which plays a vital role in morpho-physiological processes for achieving enhanced productivity. The main goal was to evaluate how different nutrio-hormona...

Open access Research Article 10.9734/ijecc/2023/v13i102878

Future Projections of Rainfall for Tamil Nadu from Coupled Model Intercomparison Project- 6 (CMIP6)

S. Divyadharshini, V. Geethalakshmi, K. Bhuvaneshwari, Ga. Dheebakaran, R. Karthikeyan, K. Thirukumaran, V. Karthick & S. Mohan Kumar · International Journal of Environment and Climate Change · 2023

Precipitation is a crucial input for agriculture and living things in the world, which changes drastically under a warmer climate due to climate change. Hence, the study was carried out to project the changes in annual and seasonal precipitation based on the France Centre Nationa...

Open access Research Article 10.9734/ijecc/2023/v13i102667

Enhancing Morpho-Physiological and Yield Potential of Rice using Nutrients and Plant Growth Regulators

V. Preethi, V. Ravichandran, V. Babu Rajendra Prasad, K. Iyanar & R. Karthikeyan · International Journal of Plant & Soil Science · 2023

Rice (Oryza sativa L.) is one of the major cereals and the staple food crops which is cultivated all over the   world. In order to meet the growing demand of population, it is important to increase the productivity of crop. The productivity of crop is influenced by nutrients and...

Open access Research Article 10.9734/ijpss/2023/v35i193537

Performance of Planting Methods and Sett Treatments on Quality, Nutrient Uptake and Economics of Bajra Napier Hybrid Grass (Pennisetum glaucum L. X P. purpureum schumach)

S. V. Varshini, C. Jayanthi, S. D. Sivakumar, A. Senthil, P. Malarvizhi & R. Karthikeyan · Current Journal of Applied Science and Technology · 2020

A field experiment to assess the effect of  planting methods and sett treatments on quality, nutrient uptake and economics of bajra napier hybrid grass CO (BN) 5 was conducted during 2018-2019 at the Eastern block farm of the Department of Agronomy, Tamil Nadu Agricultural Univer...

Open access Research Article 10.9734/cjast/2020/v39i1930823