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Article ; Online: Phasing of Zn Application on Yield, Sustainability Index and Soil Zn Fractions Under a Rice-Rice Cropping System Grown in an Inceptisols

Jena, Bandita / Nayak, R.K. / Biswas, P.K. / Das, J. / Shukla, A.K.

Communications in Soil Science and Plant Analysis. 2023 May 15, v. 54, no. 9 p.1176-1184

2023

Abstract: Presence of Zn deficiency in soils and its subsequent management forms the basis of the present investigation. To find out the optimum dose and frequency of Zn application a field experiment was conducted by taking fou graded doses of Zn applied in ... ...

Abstract	Presence of Zn deficiency in soils and its subsequent management forms the basis of the present investigation. To find out the optimum dose and frequency of Zn application a field experiment was conducted by taking fou graded doses of Zn applied in phasing through three frequencies upto 5 year to a rice-rice cropping system grown in an Inceptisols of central farm,OUAT,Bhubaneswar,Odisha. Zinc fractionation study was conducted in initial and post harvest soil to address the possible fate of Zn application on various Zn pools and on yield of rice – rice cropping system. Results after five cropping cycles revealed that rice crop responded to Zn application both to increasing dose and frequency of Zn by producing highest mean grain yield of 4.3 t/ha as well as cumulative yield of 21.3 t/ha in the treatment of every year Zn application @ 5 kg/ha with highest gross return of 1.33 per rupee investment. Highest response of 37% over no Zn application was observed in the same treatment. Among the soil Zn pools affected by Zn application was organic and amorphous oxide bound forms. Residual fraction constituted the highest percent of total Zn among all fractions. Nominal increase in DTPA extractable Zn in post harvest soil under every year Zn application was noticed. Hence for rice growing lowland soils of Odisha application of small dose Zn@ 5 kg/ha every year to the first crop of a rice-rice cropping system can produce a sustainable yield upto 5 year without any adverse effect on soil.
Keywords	Inceptisols ; adverse effects ; field experimentation ; fractionation ; grain yield ; plant analysis ; rice ; zinc ; productivity ; rice-rice ; Zn ; Zn pools
Language	English
Dates of publication	2023-0515
Size	p. 1176-1184.
Publishing place	Taylor & Francis
Document type	Article ; Online
ZDB-ID	419718-5
ISSN	1532-2416 ; 0010-3624
ISSN (online)	1532-2416
ISSN	0010-3624
DOI	10.1080/00103624.2022.2138907
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Influence of potassium on mineral content, yield and quality attributes of dragon fruit (Selenicereus monacanthus) in acidic soil of Eastern tropical region of India

Sahu, Ankita / Kishore, Kundan / Nayak, R. K. / Dāśa, Surendra Nātha / Sahoo, S. C. / Barik, Subhashree

Journal of Plant Nutrition. 2023 July 3, v. 46, no. 11 p.2621-2636

2023

Abstract: Production of quality fruits has always been the priority for ensuring better nutrition and market value. Considering the role of potassium in fruit quality improvement a study was carried out in dragon fruit under open field condition during 2020 and ... ...

Abstract	Production of quality fruits has always been the priority for ensuring better nutrition and market value. Considering the role of potassium in fruit quality improvement a study was carried out in dragon fruit under open field condition during 2020 and 2021 in the eastern tropical climatic condition of India. The treatments comprised viz., K-absentia as control (T1), K 50 g hill⁻¹ year⁻¹ (T2), K 100 g hill⁻¹ year⁻¹ (T3), K 200 g hill⁻¹ year⁻¹ (T4), K 300 g hill⁻¹ year⁻¹ (T5), K 400 g hill⁻¹ year⁻¹ (T6) and K 500 g hill⁻¹ year⁻¹ (T7). Application of K @300 g hill⁻¹ year⁻¹ exhibited the maximal acquisition of minerals such as N, P, K, Mg, Fe, Mn, Zn, Cu in shoot and fruit pulp of dragon fruit. However, calcium did not exhibit a discernible trend. However, excessive dose of K (500 g hill⁻¹year⁻¹) resulted in declination in mineral acquisition. K 300 g hill⁻¹ year⁻¹ (T5) also demonstrated enhanced absolute fruit growth rate, maximal yield, marketable yield, fruit weight, color attributes, bio-chemical attributes such as TSS, carbohydrate, reducing sugar (∼20%), protein, citric acid, ascorbic acid content (∼2 times). Additionally, the same treatment also manifested an enhancement in biochemical attributes such as betacyanin (∼2.2 times), total phenol (∼55%), total flavonoid (∼2.7 times), α-amylase and sucrose synthase activities, and antioxidative property (FRAP activity). Principal component analysis (PCA) illustrated the maximal proximity of most of the variables (quality attributes and mineral nutrient contents) with T5 (K 300 g hill⁻¹ year⁻¹), exemplifying it as the best representative of all the studied variables.
Keywords	Hylocereus ; Selenicereus ; acid soils ; alpha-amylase ; antioxidant activity ; ascorbic acid ; calcium ; citric acid ; climatic factors ; color ; flavonoids ; fruit pulp ; fruit quality ; fruit weight ; fruiting ; market value ; mineral content ; phenols ; plant nutrition ; potassium ; principal component analysis ; sucrose synthase ; tropics ; India ; dragon fruit ; enzyme ; minerals
Language	English
Dates of publication	2023-0703
Size	p. 2621-2636.
Publishing place	Taylor & Francis
Document type	Article ; Online
ZDB-ID	446190-3
ISSN	1532-4087 ; 0190-4167
ISSN (online)	1532-4087
ISSN	0190-4167
DOI	10.1080/01904167.2022.2160744
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Article: INSAT-3D SST and its diurnal variability assessment using in-situ and MODIS observations

Swapna, M. / Nayak, R.K. / Santhoshi, T. / Sesha Sai, M.V.R. / Rajashekhar, S.S.

Progress in oceanography. 2022 Feb., v. 201

2022

Abstract: Sea Surface Temperature is an Essential Climate Variable used in oceanographic and meteorological application studies such as air-sea interaction, ocean mixing, boundary layer processes, and ocean state forecast, which require high temporal resolution ... ...

Abstract	Sea Surface Temperature is an Essential Climate Variable used in oceanographic and meteorological application studies such as air-sea interaction, ocean mixing, boundary layer processes, and ocean state forecast, which require high temporal resolution SST. Indian geostationary satellite INSAT-3D imager has been designed to provide such information at 30 min intervals, 4 km spatial resolution along with several other parameters over the North Indian Ocean. In this study, the 30-minute interval INSAT-3D SST and its diurnal variability are validated (inter-compared) with collocated in-situ buoy measurements and compared with contemporary MODerate-resolution Imaging Spectroradiometer SST observations. A reasonable agreement exists between the INSAT-3D and in situ data with a correlation coefficient of 0.70 and Root Mean Square Error (RMSE) of 1.28 °C. This relationship is better for the daytime observations and during the pre and post-monsoon seasons, while the relationship is relatively weaker for the nighttime and monsoon seasons with remarked imprints from convective processes in the upper oceans. For the Arabian Sea and Bay of Bengal regions, the INSAT-3D SST shows better correlation and negative bias in comparison with in situ observations, while it is weaker with positive bias for the Equatorial Indian Ocean. Inter-comparison with MODIS Aqua/Terra day and night passes SST also shows a similar relationship, however with a much-improved correlation coefficient (∼0.95) and highly consistent in spatial and temporal variability with a cool bias of 0.14 °C. INSAT-3D SST shows a significantly high average diurnal temperature difference of 2.24 °C, whereas buoys show 0.54 °C. These high RMSE and diurnal variability results suggest that INSAT-3D SST retrieval can be improved to study the many oceanographic processes such as eddies, fronts, and estimation of air-sea fluxes. Therefore, this study helps to improve the retrieval algorithm of INSAT-3D SST, by developing the region-specific regression coefficients along with data merging and assimilation techniques.
Keywords	algorithms ; climate ; diurnal variation ; monsoon season ; oceanography ; satellites ; surface water temperature ; Arabian Sea ; Bay of Bengal ; Indian Ocean
Language	English
Dates of publication	2022-02
Publishing place	Elsevier Ltd
Document type	Article
ISSN	0079-6611
DOI	10.1016/j.pocean.2022.102739
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Persistence of marine heat waves for coral bleaching and their spectral characteristics around Andaman coral reef.

Mohanty, P C / Kushabaha, A / Mahendra, R S / Nayak, R K / Sahu, B K / Rao, E Pattabhi Rama / Kumar, T Sinivasa

Environmental monitoring and assessment

2021 Volume 193, Issue 8, Page(s) 491

Abstract: Coral reefs are fragile and endangered ecosystems in the tropical marine and coastal environment. Thermal stress due to marine heat waves (MHW) could cause significantly negative impacts on the health conditions, i.e., bleaching of the coral ecosystem. ... ...

Abstract	Coral reefs are fragile and endangered ecosystems in the tropical marine and coastal environment. Thermal stress due to marine heat waves (MHW) could cause significantly negative impacts on the health conditions, i.e., bleaching of the coral ecosystem. The current study is an attempt to quantify the intensity of coral bleaching in the Andaman region in recent decades using the intensity of marine heat wave (IMHW) estimated from satellite measured sea surface temperature (SST). A linear regression model was developed between IMHW and in situ observations of percent coral bleaching (PCB) which has the slope 7.767 (of IMHW unit) and intercept (- 141.7). Further, an attempt was also made to establish the relationship between PCB and the ratio between the remote sensing reflectance (Rrs) at 443 and 531 nm to upscale the percentage of coral bleaching at synoptic scales. A significant positive correlation between the PCB and band ratio index was found (R
MeSH term(s)	Animals ; Anthozoa ; Coral Reefs ; Ecosystem ; Environmental Monitoring ; Hot Temperature
Language	English
Publishing date	2021-07-14
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	782621-7
ISSN	1573-2959 ; 0167-6369
ISSN (online)	1573-2959
ISSN	0167-6369
DOI	10.1007/s10661-021-09264-y
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Persistence of marine heat waves for coral bleaching and their spectral characteristics around Andaman coral reef

Mohanty, P. C. / Kushabaha, A. / Mahendra, R. S. / Nayak, R. K. / Sahu, B. K / Rao, E. Pattabhi Rama / Kumar, T. Sinivasa

Environmental monitoring and assessment. 2021 Aug., v. 193, no. 8

2021

Abstract	Coral reefs are fragile and endangered ecosystems in the tropical marine and coastal environment. Thermal stress due to marine heat waves (MHW) could cause significantly negative impacts on the health conditions, i.e., bleaching of the coral ecosystem. The current study is an attempt to quantify the intensity of coral bleaching in the Andaman region in recent decades using the intensity of marine heat wave (IMHW) estimated from satellite measured sea surface temperature (SST). A linear regression model was developed between IMHW and in situ observations of percent coral bleaching (PCB) which has the slope 7.767 (of IMHW unit) and intercept (− 141.7). Further, an attempt was also made to establish the relationship between PCB and the ratio between the remote sensing reflectance (Rrs) at 443 and 531 nm to upscale the percentage of coral bleaching at synoptic scales. A significant positive correlation between the PCB and band ratio index was found (R² = 0.72). This approach can be used for the operational monitoring of coral reef beaching in this region.
Keywords	coral reefs ; corals ; heat ; reflectance ; regression analysis ; satellites ; surface water temperature ; thermal stress
Language	English
Dates of publication	2021-08
Size	p. 491.
Publishing place	Springer International Publishing
Document type	Article
ZDB-ID	782621-7
ISSN	1573-2959 ; 0167-6369
ISSN (online)	1573-2959
ISSN	0167-6369
DOI	10.1007/s10661-021-09264-y
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Developing Soil Test-based Fertilizer Recommendations

Chander, G / Choudhari, P / Sawargaonkar, G / Mishra, A / Nayak, R K

2020

Abstract: Soil health mapping in the state of Odisha aimed at improving crop productivity and thereby the rural livelihoods of those depending on the agrarian economy. The activity began with the collection of 40,265 representative soil samples using stratified ... ...

Abstract	Soil health mapping in the state of Odisha aimed at improving crop productivity and thereby the rural livelihoods of those depending on the agrarian economy. The activity began with the collection of 40,265 representative soil samples using stratified random sampling across 30 districts. This was a first of its kind, systematic exercise aimed at diagnosing soil fertility- related constraints in the state in order to ascertain macro and micronutrient deficiencies and develop practical recommendations for scaling-out.
Keywords	Soil ; Crop Yield ; Fertilizers
Language	English
Publisher	ICRISAT
Publishing country	in
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Management of Acidic Soils

Mishra, A / Nayak, R K / Chander, G / Reddy, M / Choudhari, P

2020

Abstract: Soil acidity is a serious constraint to crop production in many regions of the world including India. Acidic soils in India are mainly prevalent in the humid Southwestern, Northeastern and Himalayan regions (Maji et al. 2008). They are particularly acute ...

Abstract	Soil acidity is a serious constraint to crop production in many regions of the world including India. Acidic soils in India are mainly prevalent in the humid Southwestern, Northeastern and Himalayan regions (Maji et al. 2008). They are particularly acute in the humid tropical regions that have been subjected to severe weathering. In India, about 48 m ha out of 142 m ha of arable land are affected by acidity, of which 25 m ha have pH below 5.5 and 23 m ha have pH between 5.6 and 6.5 (Mandal 1997). Strongly acidic and moderately acidic soils cover 6.24 m ha (1.9%) and 24.41 m ha (7.4%), respectively of the country’s total geographic area (Maji et al. 2012). In the Northeastern region, approximately 95% of the soils are acidic and nearly 65% have strong acidity with pH below 5.5 (Sharma and Singh 2002). Acidic soils of Odisha account for 70% of its total geographical area (Jena 2008). A similar finding was reported in Odisha by Nanda et al. (2008) based on the analyses of 1,219,000 soil samples. A recent study conducted by ICRISAT found that of the 40,265 soil samples analysed, more than 80% were acidic in nature
Keywords	Soil Science
Subject code	910
Language	English
Publisher	ICRISAT
Publishing country	in
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Geospatial Assessment of Flood Hazard Along the Tamil Nadu Coast

Mohanty, P. C / Panditrao, Satej / Mahendra, R. S / Kumar, H. Shiva / Bharadwaj, Sai P / Nayak, R. K / Ramarao, E. Pattabhi

Journal of the Indian Society of Remote Sensing. 2019 Oct., v. 47, no. 10

2019

Abstract: During November–December 2015, very heavy rainfall caused severe flood in Southern Tamil Nadu that resulted in severe damages with huge economic losses as per news agency Times of India. Remote sensing data from Sentinel-1 synthetic aperture radar (SAR) ... ...

Abstract	During November–December 2015, very heavy rainfall caused severe flood in Southern Tamil Nadu that resulted in severe damages with huge economic losses as per news agency Times of India. Remote sensing data from Sentinel-1 synthetic aperture radar (SAR) and Landsat-8. Operational land imager (OLI) images together with ancillary information such as rainfall and demographic data were used in the current study to assess the extent and impact of flooding. The SAR data are used to map the flood or inundation zones. Landsat-8 OLI is used to extract built-up area affected by the flood employing three methods: built-up area extraction method (BAEM), BAEM with Enhanced Built-up and Bareness Index (EBBI), and modified Normalized Difference Built-up Index (NDBI) approach. The classification accuracies obtained for these three approaches were 89, 83.5, and 78% for BAEM (using EBBI), BAEM, and NDBI, respectively. Aerial comparison of built-up area extracted using BAEM (using EBBI) shows the best accuracy with respect to the built-up area obtained from very high-resolution imagery. This extracted built-up area BAEM (using EBBI) method was used to estimate the extent of inundation covering the built-up area. Further the flooding risk at village level was assessed using the population density and flooding area. Built-up area extracted was also overlaid with flooding area to highlight actual built-up areas under risk due to flood.
Keywords	Landsat ; coasts ; financial economics ; geospatial data processing ; image analysis ; population density ; rain ; remote sensing ; risk assessment ; spatial data ; synthetic aperture radar ; villages ; India
Language	English
Dates of publication	2019-10
Size	p. 1657-1669.
Publishing place	Springer India
Document type	Article
ZDB-ID	2439566-3
ISSN	0974-3006 ; 0255-660X
ISSN (online)	0974-3006
ISSN	0255-660X
DOI	10.1007/s12524-019-01012-7
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Article: Transfusion Dependent Beta-Thalassemia Developing Avascular Necrosis of Femoral Head: A Rare Case.

Behera, S K / Jena, R K / Sethy, S / Nayak, R K / Panigrahi, Ashutosh

Indian journal of hematology & blood transfusion : an official journal of Indian Society of Hematology and Blood Transfusion

2016 Volume 33, Issue 3, Page(s) 421–422

Language	English
Publishing date	2016-12-10
Publishing country	India
Document type	Journal Article
ZDB-ID	2422370-0
ISSN	0974-0449 ; 0971-4502
ISSN (online)	0974-0449
ISSN	0971-4502
DOI	10.1007/s12288-016-0747-y
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Article: Overseas Doctors Training Scheme. Really an employment scheme.

Nayak, R K

BMJ (Clinical research ed.)

1994 Volume 309, Issue 6954, Page(s) 606–607

MeSH term(s)	Education, Medical, Graduate ; Foreign Medical Graduates ; Humans ; India ; Orthopedics/education ; United Kingdom
Language	English
Publishing date	1994-09-03
Publishing country	England
Document type	Letter ; Comment
ZDB-ID	1362901-3
ISSN	1756-1833 ; 0959-8138 ; 0959-8154 ; 0959-8146 ; 0959-535X ; 1759-2151
ISSN (online)	1756-1833
ISSN	0959-8138 ; 0959-8154 ; 0959-8146 ; 0959-535X ; 1759-2151
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