Sivakumar Karthikeyan
@tnau.ac.in
Assistant Professor (Soil Science and Agricultural Chemistry)
Tamil Nadu Agricultural University
RESEARCH INTERESTS
Soil fertility ,soil pedology , Remote Sensing and GIS ,Forest Soil Carbon Sequestration
Scopus Publications
Scopus Publications
Karuppanan Ramasamy Ramesh, Harshavardhan Krishnarao Deshmukh, Karthikeyan Sivakumar, Vipan Guleria, Rathod Digvijaysinh Umedsinh, Nathakrishnan Krishnakumar, Alagesan Thangamalar, Kathirvel Suganya, Mariyappan Kiruba, Thiru Selvan,et al.
MDPI AG
Agroforestry benefits farmers, making it a sustainable alternative to monoculture. To create a viable Eucalyptus clone-based agroforestry system, a field experiment was carried out in Tamil Nadu, India. The economics and changes in the soil qualities were evaluated by growing agricultural and horticultural crops, namely pearl millet, sorghum, maize, sesame, small onions, green gram, and red gram, as intercrops under eight-month-old eucalyptus clone trees using a randomised block design in three replications at a spacing of 3 m × 1.5 m. The plots for the intercrops and the eucalyptus clones were kept apart for comparison. Maize showed the greatest drop in plant height during all the phases, including 30 DAS, 60 DAS, and harvest, while small onions showed the least reduction in plant height. Sesame and small onions showed the greatest drop in dry matter production, whereas sorghum showed the least. In terms of the intercrop yield reduction, maize had the biggest reduction and green gram had the lowest. Red gram had the largest crop equivalent yield, whereas maize had the lowest. The volume of the trees was generally increased more favourably by red gram than by green gram. The intercrops had some effects on the nutrients in the soil. Red gram intercropping had the highest levels of EC, soil organic carbon, available soil nitrogen, available soil phosphorus, and available soil potassium, while the sole tree treatment had the lowest levels. Small onions, red gram, and sesame were the crops; tree + small onion, tree + red gram, and tree + sesame were the intercrop combinations with the highest gross income, net income, and B:C in the intercropping treatment alone. Tree + green gram had the highest land equivalent ratio (LER) and the red gram, sesame, and small onion intercrops were shown to be the most profitable. Although the present study supports a complementary relationship, the lack of awareness among farmers of Eucalyptus allelopathy formed the major limitation.
T. Kongeswaran, K. Sivakumar, A. Muruganantham, K. Prabakaran, V. Perumal, V. Agastheeswaran, S. Bangaru Priyanga, and R. Muthuramalingam
IOS Press
The purpose of this study is to evaluate the quality of groundwater for drinking and irrigation in the Avudaiyarkoil block of the Pudukottai district, which is a drought-prone region. Samples were collected from 20 wells on January 2021 and analysed for the water quality parameters, such as pH, EC, TDS, Ca2+, Mg2+, Na+, K+, Cl-, HCO3, SO4, NO3 and F-. The analysis revealed that SO4 is the dominant ion followed by Cl-, HCO3-, Na+, Ca2+, Mg2+, K+, NO3- and F- with respect to the mean value 292>234>208.4>125>100>24.75>18>16.15>0.2. The analytical results were compared with WHO and BIS guideline values to know the groundwater potability and TH, TA, SAR, Na%, RSC, PI, MgC and KI were calculated using the analytical results to identify the suitability of groundwater for irrigation purposes.
Arumugam Muruganantham, Karthikeyan Sivakumar, Kulandaisamy Prabakaran, Thangaraj Kongeswaran, Senapathi Venkatramanan, Sundaram Bangaru Priyanga, Vellaikannu Agastheeswaran, and Velmayil Perumal
Springer Science and Business Media LLC
A. Ramachandran, K. Sivakumar, A. Shanmugasundharam, U. Sangunathan, and R.R. Krishnamurthy
Elsevier BV
S. K, Ramah K, Surendran U, Kaleeswari R. K. and J. M
Journal of Applied and Natural Science
Attention to intercropping for sustainable agriculture is increasing, and scientific studies on intercropping have also grown in recent years. Agroforestry Systems, which combine annual crops with trees, are used widely in semiarid regions to reduce wind erosion and improve the efficiency of resources such as water and nutrients. Field experiments were conducted at Tamil Nadu Newsprint and Papers Limited Farm, Mondipatty, Tamil Nadu, to study the compatibility of intercropping systems in the Dalbergia sissoo-based Horti-silvicultural system for two years during 2016 and 2017. The experiments were conducted in a split-plot design with four replications.The main plot treatments were M1: Cassava M2:Chillies and the subplot treatments were five nutrient management packages viz., S1: Untreated control, S2: 100 % Recommended Dose of Fertilizers (Cassava: 90: 90: 240 and Chillies: 60: 80: 80),S3: 125 % Recommended Dose of Fertilizers (Cassava: 112.5: 112.5: 300 and Chillies: 75: 100: 100), S4:150 % (Cassava: 135: 135: 360 and Chillies: 90: 120: 120) Recommended Dose of Fertilizers, S5: Soil Test Crop Response studies - Integrated Plant Nutrient Supply System -based recommendation (as per soil test value). The results indicated that the Horti-Silvicultural system of growing Cassava and Chillies along with D. sissoo performed well. It was observed that statistically significant (p ≤ 0.05) higher yields of 17.8 tha-1 and 1.6 tha-1 were recorded in Cassava and Chillies, respectively, in treatment S5, where the fertilizer was applied based on the Soil Test Crop Response studies - Integrated Plant Nutrient Supply System. In addition, the soil fertility status was also sustained in this plot. The fertilizers applied to the intercrops have contributed to the nutrient requirement of the tree crop and thereby reduced the cost of cultivation in the agroforestry system.
M. Sonaimuthu, K. Sivakumar, K. Rajan, M. Tilak, R. Jude Sudhagar, P. Raja, and D. Dinesh
Diva Enterprises Private Limited
S. Mahendran, P. Rajendran, K.T. Parthiban, K. Sivakumar, and P. Prabakaran
EJPB, ISPB, CPBG - Tamil Nadu Agricultural University
Twelve-month-old superior 20 half-sib progenies of Thespesiapopulnea were evaluated nine months after planting for genetic variability, heritability, genetic gain, correlation and path analysis at Perugavalthan, Thiruvarur District, Tamil Nadu during 2014. Among the 20 half-sibs, progenies collected fromAathikadu recorded higher growth characters followed by Periyampatti and T. Nagar. Volume index registered highest phenotypic and genotypic coefficient of variation followed by height. Maximum heritability was observed for volume index followed by height and basal diameter. Volume index was found to be associated with higher genetic gain while it was low for height and basal diameter. Volume index had high and significant positive phenotypic and genotypic correlation with height and basal diameter. Path analysis showed that basal diameter and height contributed directly to the volume index. The half-sib progenies of Thespesiapopulnea collected from Aathikadu, Periyampatti and T. Nagar were proved to be superior on the basis of characters under study in coastal saline soil.