Shankar Meti

University of horticultural sciences, Bagalkot, Agronomy, Faculty Member

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Address: Assistant Professor(Agronomy)
Directorate of Research Office
University of Horticulture Sciences,
Udyanagiri, Bagalkot- 587104
Karnataka

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Papers by Shankar Meti

Broomrape control in bidi tobacco by soil solarization

Feasibility of Rubber+Tea Intercropping during Immature Phase of Rubber

International Journal of Current Microbiology and Applied Sciences, 2019

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Satellite based remote sensing technique as a tool for real time monitoring of leaf retention in natural rubber plantations affected by abnormal leaf fall disease

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014

Most parts of the traditional natural rubber growing regions of India, extending from Kanyakumari... more Most parts of the traditional natural rubber growing regions of India, extending from Kanyakumari district of Tamil Nadu in the South to Kasaragod district of Kerala in the North received excess and prolonged rains during 2013. This led to severe incidence of Abnormal Leaf Fall (ALF) disease caused by the fungus, Phytophthora sp. The present study demonstrated the first time use of satellite remote sensing technique to monitor ALF disease by estimating Leaf Area Index (LAI) in natural rubber holdings in near real time. Leaf retention was monitored in between April and December 2012 and 2013 by estimating LAI using MODIS 15A2 product covering rubber holdings spread across all districts in the traditional rubber growing region of the country that was mapped using Resourcesat LISS III 2012 and 2013 data. It was found that as the monsoon advanced, LAI decreased substantially in both years, but the reduction was much more substantial and prolonged in many districts during 2013 than 2012 reflecting increased leaf fall due to ALF disease in 2013. The decline was more pronounced in central and northern Kerala than in the South. Kanyakumari district of Tamil Nadu is generally known to be free from ALF disease, but there was considerable leaf loss due to ALF in June 2012 and June and July 2013 even as the monsoon was unusually severe in 2013. Weighted mean LAI during for the entire period of April to December was estimated as a weighted average of LAI and per cent of total area under rubber in each district in the study area for the two years. This was markedly less in 2013 than 2012. The implications of poor leaf retention for biomass production (net primary productivity), carbon sequestration and rubber yield are discussed.

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Effect of type and thickness of polyethylene on soil solarization

Indian Journal of Agronomy, Mar 7, 1994

In vitro Screening of New Fungicide Molecules against Alternaria sp. Isolated from Tomato

International Journal of Plant & Soil Science

Early blight disease caused by Alternaria spp. is one of the major limiting factors in tomato-gro... more Early blight disease caused by Alternaria spp. is one of the major limiting factors in tomato-growing areas of the country, causing considerable yield loss. Early blight can be effectively managed by cultural practices, chemical fungicides, and through the use of resistant genotypes. Cultural practice alone are not sufficient for the control of early blight, hence several fungicides have been developed and tried for the management of early blight. In the present study, in order to develop effective management practices against the early blight of tomato, a total of 22 fungicides comprising six systemic, six contact and ten combi products were tested for their fungitoxicity against Alternaria sp. under in vitro by following the poisoned food technique. All the fungicides significantly reduced the radial mycelial growth of Alternaria spp. Based on the maximum inhibition at the lowest concentration, the six fungicides i.e. Hexaconazole 5% EC (50.00), Propiconazole 25 % EC (65.00), Tebu...

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Farmers’ Acuity on Climate Change in the Central Dry Zone of Karnataka

INDIAN JOURNAL OF EXTENSION EDUCATION

To counteract the vulnerability results from climate change, it is critical to understand farmers... more To counteract the vulnerability results from climate change, it is critical to understand farmers’ viewpoints. In Karnataka, farmers’ perspectives, implications, adaptive measures, and barriers were investigated during 2021 by collecting the data from farmers using multistage random sample technique. Farmers witnessed significant changes in temperature, rainfall distribution, emergence of new plant pests and infirmity over time as a result of the introduction of new cultivars/crops, and the occurrence of drought/flood, according to the data. Crop harvests were inconsistent, depleted common property resources, and costs had risen as a result. Cultivation of stress-tolerant cultivars, drilling bore wells, novel plant protection molecules, changing sowing/harvesting dates, and water-saving techniques were among the adaptation strategies. Climate adaptation challenges in the region included highcost farm inputs for climate-smart agriculture, labour scarcity, lack of shared water resourc...

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Sentinel 2 and LANDSAT-8 Bands Sensitivity Analysis for Mapping of Alkaline Soil in Northern Dry Zone of Karnataka, India

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019

Soil salinization is most common land degradation process occurring in deep vertisol of northern ... more Soil salinization is most common land degradation process occurring in deep vertisol of northern dry zone of Karnataka, India. Accurate and high resolution spatial information on salinization can assist policy makers to better target areas for interventions to avoid aggravation of soil degradation process. Digital soil mapping using satellite data has been identified as a potential means of obtaining soil information. This paper focuses on exploring possibility of using new generation medium resolution Landsat-8 and Sentinel-2 satellite data to map alkaline soils of Ramthal irrigation project area in north Karnataka. Surface soil salinity parameters of zone 20 were correlated with reflectance values of different band and band combination and traditional salinity indices and result has indicated that SWIR bands of both satellite showed significant negative correlation with soil pH, EC(r=-0.39 to-0.45) whereas visible and NIR bands did not show significant relation. However rationing of SWIR bands with visible blue band has significantly improved the correlation with soil pH and EC (r= +0.60 to +0.70). Traditional salinity index based on visible bands failed to show significant correlation with soil parameters. It is interesting to note that SWIR bands alone did not show significant correlation with soil sodicity parameters like exchangeable Na, SAR, RSC but band rationing with blue bands has significantly improved the correlation (r=0.45). High resolution soil salinity map was prepared using simple linear regression model and using this map will serve as base map for the policy makers.

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Studies on Zeolite-LDPE Composite Bags to Extend the Shelf Life of Acid Lime Fruits Stored at Ambient Conditions

International Journal of Current Microbiology and Applied Sciences, 2020

Citrus fruits are non-climacteric, with persistently low respiration and ethylene production rate... more Citrus fruits are non-climacteric, with persistently low respiration and ethylene production rates, do not undergo any major softening or compositional changes after harvest therefore, can normally be stored for long periods (Kader, 2002). However, two major problems limit facing the long-term storage capability of citrus fruit: the first is

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Engineered Polymeric and Nano-materials for Taming Salty Soils and Waters Used for Crop Production

World food production systems, mainly cropping systems, are set to deal with exceptional stress f... more World food production systems, mainly cropping systems, are set to deal with exceptional stress for matching agricultural food production demand with the growing population, particularly in the backdrop of climatic changes. The increase in production cannot be attained with the same approaches as were followed in the past. A large extent of less productive lands (including salt-affected soils) in India and the world represent opportunity for boosting sustainable food production via land recovery, enhanced productivity, resource conservation practices, and by enhancing biological functions of soil. The soluble salts present in the water and soil, including groundwater and surface water, pose excessive threat to the productivity of land. Odd practices, such as land clearing and poor irrigation management, have considerably increased the magnitude of the problem. High concentration of salts in the soil is harmful to plants as it restricts uptake of water and nutrients by the plants.

Spatio Temporal Analysis of Rubber Area and Its Association with Soil and Topography in Kanyakumari District

Rubber Research Institute of India, 2014

Reliable and up to date information on agricultural land and its changes are important for agricu... more Reliable and up to date information on agricultural land and its changes are important for agriculture planning and management. Using remote sensing and GIS techniques, the present work aimed to find the spatio-temporal changes in natural rubber areas in Kanyakumari district of Tamil Nadu over a period of 27 years (1980-2007) and its distribution over soil management units (SMU) and slope. Landsat MSS and TM as well as IRS P6 LISS III data were used as satellite input data and ASTER digital elevation data for deriving slope information and ortho-rectification of satellite image. Satellite images were individually classified using K means clustering and labeled based on ground knowledge and ground control points (GCP) and compared with ground survey statistics. Rubber area along with slope and SMU map was brought into GIS and overlay analysis was done to understand the spatio-temporal changes in rubber area. Area under rubber in 1980 was 10693.3 ha and it increased to 15886.7 ha in 1992 and then to 20781.7 ha in 2007. About 8891.5 ha have been newly planted with rubber during 1980-2007. Majority of this newly planted area has come up in good to moderate soil with moderate to gentle slope. Present study also revealed that rubber area is skewed towards old plantations. The study assumes significance because so far no spatio-temporal rubber area mapping has been carried out in the study area. And also the study has thrown light on the skewed distribution of rubber area towards old age which will be useful for planning the replanting programmes. There is a need for integrated analysis of rubber area distribution with soil, topography and climate variation to assess their influence on rubber performance and to develop site specific management practices.

Simple Estimates for Optimization of Potassium Nutrition in Vineyards

Current Science Association, 2019

Identification and mapping of natural rubber plantations and potential areas for its cultivation in Assam using remote sensing technology

Rubber Science, 2017

Application of remote sensing and GIS for estimating area under natural rubber cultivation in India

Rubber Science, 2016

Growth and yield of new generation clones of Hevea under the agroclimate of sub-Himalayan West Bengal

Journal of Plantation Crops, 2015

Five rubber (Hevea brasiliensis) clones of the RRII 400 series derived from a cross involving RRI... more Five rubber (Hevea brasiliensis) clones of the RRII 400 series derived from a cross involving RRII 105 and RRIC 100, along with five other popular clones viz. PB 217, RRII 176, RRII 203, RRII 105 and RRIM 600, were evaluated in Jalpaiguri district of subHimalayan West Bengal. Growth of clones in the immature and mature phases, rubber yield over seven years of tapping, biomass and timber yield were recorded for assessing the suitability of clones to the region. Clones RRII 429, RRII 417 and RRII 203 were superior in performance in the region compared to the recommended clone RRIM 600. Estimates of genetic parameters revealed comparatively high heritability and scope for improvement of rubber yield by selection.

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Horticulture Crops Scenario in Northern Karnataka under Changing Climate

Karnataka is in the forefront in the horticulture sector growth in India. There is more diversifi... more Karnataka is in the forefront in the horticulture sector growth in India. There is more diversification of agriculture towards horticulture particularly in northern Karnataka which is dry zone and experiences a high temperature and receives low rainfall. Climate change and variability are reality and understanding its impact is a challenge for cultivation of horticulture crops. To understand impact of future climate, grape was chosen as test crop and assessed area suitability and irrigation requirement under future climate in Bagalkot district using mechanistic Ecocrop model and Food and Agriculture Organization (FAO)

Nutritional Studies on Vegetable Soybean [Glycine max (L.) Merrill], in Northern Dryzone of Karnataka, India

International Journal of Current Microbiology and Applied Sciences, Dec 10, 2017

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Comparison of Petiole Nutrient Contents of Different Table and Wine Grape Varieties

International Journal of Current Microbiology and Applied Sciences, Jan 10, 2018

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Response of Soybean to Fertilizer Levels in Northern Dry Zone of Karnataka, India

International Journal of Current Microbiology and Applied Sciences, 2018

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Effect of Potassium Levels, Sources and Time of Application on Storage Life of Onion (Allium cepa L.)

International Journal of Current Microbiology and Applied Sciences, 2018

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Climate Based Coconut Yield Analysis in Chanrayapatna Taluk of Hassan District of Karnataka, India

International Journal of Current Microbiology and Applied Sciences, 2019

Coconut is the second largest and important horticultural crop of the Karnataka state, occupying ... more Coconut is the second largest and important horticultural crop of the Karnataka state, occupying 31 per cent of the total area under horticultural crop. The total area under coconut in the state is around 4.33 lakh hectares and the annual production of coconut is 303.6 million nuts. Tumkur followed by Hassan are the largest coconut producing district in Karnataka. The coconut is a perennial crop and it has a prolonged

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