Highlights Volume 26, Issue 1, 2021
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www.squ.edu.om/agr/JAMS JAMS Journal of Agricultural and Marine Sciences Soil and water sampling sites. Highlights Volume 26, Issue 1, 2021 • Spatial and Temporal Assessment of Vegetation Cover in Al- Suwaiq Using Satellite Images Analysis • Effect of Storage Conditions on Postharvest Quality of Tomatoes: A Case Study at Market-Level • Subclinical Mastitis in Camels in Oman: A Pilot Study • Biological Efficiency and Control of a Membrane Bioreactor and Conventional Activated Sludge Process for Treating Municipal Wastewater • Mean Sea Level Variability along the Northern Coast of the Oman Sea and its Response to Monsoon and the North Atlantic Oscillation Index from Tide Gauge Measurement • Protective effect of Oxalis corniculate and Pteropyrum scoparium Leaf Extracts against Azoxymethane-induced oxidative stress and colon carcinogenesis • Microbiological Assessment of Locally Dried Fish in Oman: Technical Note • Correlation between Sensory and Instrumental Textural Attributes of Date Palm (Phoenix dactylifera L.) fruits: Technical Note • Effect of COVID-19 pandemic situation on the teaching of Graduation Projects and Internship type courses in undergraduate degree programs A Sultan Qaboos University Research Journal Journal of Agricultural and Marine Sciences (JAMS) JAMS is an international peer-reviewed journal that publishes original fundamental and applied research articles in a wide variety of disciplines of the agricultural and marine sciences. The journal provides a forum for specialists and practitioners and brings together quality papers dealing with agricultural economics, natural resource economics, animal and veterinary sciences, bio-resources, biotechnologies, soil sciences, water management, agricultural engineering, fisheries, marine sciences, food science, human nutrition, plant production, plant protection, rural environment, coastal zone management and oceanography. All issues of the Journal of Agricultural and Marine Sciences are freely available online and do not carry any publication charges. Sultan Qaboos University Academic Publication Board Chair, Academic Publication Board Dr. Abdullah Ambusaidi Prof. Lamk Al-Lamki Dr. Yahya Al-Wahaibi Prof. Shafiur Rahman Dr. Ibrahim Metwally Mr. Jamal Al-Ghailani Prof. Mohammad S. Khan Dr. Mohammed Al-Saqri JAMS Editorial Board Prof. Shafiur Rahman (Editor-in-Chief) Dr. Muhammad Farooq (Editor) Associate Editors Dr. Ali Al-Maktoomi Dr. Haytham Alieldin Ali Dr. Waleed Al-Marzooqi Dr. Daniel Blackburn Dr. Lokman Zaibet Dr. Hemanatha P W Jayasuriya Dr. Zaher Al-Attabi Dr. Velazhahan Rethinasamy Dr. Rhonda Janke Dr. Michel R. Claereboudt Prof. Anvar Kacimov Dr. Mohamed Essa Musthafa Dr. Wenresti Glino Gallardo International Advisory Board Prof. James W. Oltjen, University of California, USA Prof. Paul Moughan, Massey University, New Zealand Prof. Donald C. Slack, University of Arizona, USA Prof. R. Paul Singh, University of California, USA Prof. Stephan Kasapis, RMIT University, Australia Prof. Christopher D. Lu, University of Hawaii, USA Prof. Mattheus Goosen, Alfaisal University, Saudi Arabia Prof. Ewen McLean, Virginia Polytechnic, USA Prof. Ching Yuan Hu, University of Hawaii, USA Technical Assistant: Alia Ali Al-Rutani The Journal of Agricultural and Marine Sciences (JAMS) is published by Sultan Qaboos University, P.O. Box 50, Al-Khod 123, Muscat, Sultanate of Oman. Year of issue: 2020 The content of the journal is licenced under the Creative Common (CC BY ND) licensing schemes the details of which can be found at creativecommons. org/licenses/by-nd/4.0/legalcode. The Journal of Agricultural and Marine Sciences is not responsible for opinions printed in its publications; they represent the views of the individuals to whom they are credited and are not binding to the Journal. Manuscript submission is made through an online management system at journals.squ.edu.om/index.php/jams Alternatively, if internet access is difficult, manuscripts can be emailed [email protected] Please see Guidelines for Authors at journals.squ.edu.om/index.php/jams/about/submissions#authorGuidelines Contents RESEARCH PAPERS Spatial and Temporal Assessment of Vegetation Cover in Al- Suwaiq Using Satellite Images Analysis 01 Kathiya Al-Aufi, Malik Al-Wardy, Bheemanagoud Choudri, Mushtaque Ahmed, Ghazi Al-Rawas, Yaseen Al-Mulla Effect of Storage Conditions on Postharvest Quality of Tomatoes: A Case Study at Market-Level 13 Mai Al-Dairi, Pankaj B. Pathare, Adil Al-Mahdouri Subclinical Mastitis in Camels in Oman: A Pilot Study 21 Muhammad Nadeem Asi, Waleed Al-Marzooqi, Yasmin ElTahir, Al Ghaly, Al Toobi, Sara Al Raisi, Haytham Ali, Elshafie I. Elshafie, Eugene H. Johnson Biological Efficiency and Control of a Membrane Bioreactor and Conventional Activated Sludge Process for Treating Municipal Wastewater 27 Buthaina Mahfoud Alwahaibi, Abdullah Al-Mamun, Mahad Said Baawain, Ahmed Sana Mean Sea Level Variability along the Northern Coast of the Oman Sea and its Response to Monsoon and the North Atlantic Oscillation Index from Tide Gauge Measurement 37 S. Hassanzadeh, F. Hosseinibalam Protective effect of Oxalis corniculate and Pteropyrum scoparium Leaf Extracts against Azoxymethane-induced oxidative stress and colon carcinogenesis 47 Mostafa I. Waly, Mohammed Al-Khusaibi, Nejib Guizani TECHNICAL NOTES Microbiological Assessment of Locally Dried Fish in Oman: Technical Note 53 Aaisha K. Al-Saadia, Abdulrahim M. Al-Ismaili a, Mohammed Al-Ruzeikib, Ismail M. Al-Bulushi Correlation between Sensory and Instrumental Textural Attributes of Date Palm (Phoenix dactylifera L.) fruits: Technical Note 57 Vandita Singh, Mohammad Shafiur Rahman, Nejib Guizani, Hakikulla Shah PERSPECTIVE PAPERS Effect of COVID-19 pandemic situation on the teaching of Graduation Projects and Internship type courses in undergraduate degree programs 62 Hemanatha P. W. Jayasuriya JAMS: Guidelines for authors 66 Journal of Agricultural and Marine Sciences 2021, 26(1): 1–12 DOI: 10.24200/jams.vol26iss1pp1-12 Reveived 20 July 2020 Accepted 07 Nov 2020 RESEARCH PAPER Spatial and Temporal Assessment of Vegetation Cover in Al- Suwaiq Using Satellite Images Analysis Kathiya Al-Aufi1, Malik Al-Wardy1*, Bheemanagoud Choudri2, Mushtaque Ahmed1, Ghazi Al-Rawas3, Yaseen Al-Mulla1 التقييم املكاين والزماين للغطاء النبايت يف وﻻية السويق وحتليله ابستخدام صور اﻷقمار الصناعية كاذية العويف1 ومالك الوردي1* وبيماانغود تشودري2 ومشتاق أمحد1 وغازي الرواس3 وايسني املﻻ1 Abstract. Digital change detection techniques using multi-temporal satellite imagery help in understanding land- scape dynamics. This study assesses the spatial and temporal dynamics of vegetation cover change in the coastal wilayat of Al-Suwaiq, Sultanate of Oman, using field and remote sensing data. The study was conducted at selected distances from the coastline, considering the variability in soil and water salinity. Normalized Difference Vegetation Index was calculated using the Landsat 5 TM and Landsat 8 OLI satellite images and classified into three main classes to evaluate the monthly and annual vegetation cover change between 1987 and 2016. Soil and water samples were collected during the cultivated season in Al-Suwaiq and analyzed mainly for salinity. Vegetation cover maps showed a general shift in vegetation biomass from regions closer to the coast (north-side) as water salinity increased with time. Between 1988 and 1999, vegetation cover in the total study area increased by 7.7%, whereas it declined by 1.5 % along the coast. How- ever, between 1999 and 2016, the vegetation cover decreased further by 5% along the coast while increasing by 12.2%, mainly 3-6 km from the coast. The largest increase in the area was for vegetation covers falling within the moderate (0.33-0.67) and high (0.67-0.86) NDVI classes. In conclusion, vegetation cover in Al-Suwaiq reduced along the coastline and shifted agriculture activities and increased cultivation from the North to the South of Wilayat. Therefore, agricul- ture activities on the Southside of the Wilayat should be controlled to prevent further degradation of water quality and its possible effect on agricultural farmlands. Keywords: Landsat; NDVI; Vegetation cover; Change detection; Al-Suwaiq; Soil salinity; Water salinity. :تلعباملســتخلص صــور اﻷقمــار الصناعيــة والتقنيــات الرقميــة املتصلــة هبــا دورا مهمــا يف فهــم ديناميــة التغــر يف الغطــاء النبــايت علــى اﻷرض. وتقيّــم هــذه الدراســة الديناميــات املكانيــة والزمانيــة لتغــر الغطــاء النبــايت يف وﻻيــة الســويق يف ســلطنة عمــان ابســتخدام البيــاانت امليدانيــة وبيــاانت اﻻستشــعار عــن بعــد. وأجريــت هــذه الدراســة علــى مســافات حمــددة مــن الســاحل آخــذةيف ًاﻻعتبــار التبايــن املوجــود يف ملوحــة الرتبــة وامليــاه يف منطقــة الدراســة، حيــث مت حســاب مؤشــر التغــر للغطــاء النبــايت ابســتخدام صــور القمــر الصناعــي ﻻندســات 5 والقمــر ﻻندســات 8، ومــن مث تصنيــف الغطــاء النبــايت إىل ثــﻻث فئــات رئيســة لتقييــم التغــر الشــهري والســنوي يف الغطــاء النبــايت بــني عامــي 1987 و .2016 ومت أيضــا ًمجــع عينــات مــن الرتبــة وامليــاه مــن املــزارع الــي تقــع يف منطقــة الدراســة يف وﻻيــة الســويق وحتليــل معايــر امللوحــة فيهــا. وأظهــرت خرائــط الغطــاء النبــايت تغــرا ًعامــا يف الكتلــة احليويــة للغطــاء النبــايت يف املناطــق القريبــة مــن الســاحل )مشــال منطقــة الدراســة( بســبب متلــح امليــاه مــع مــرور الوقــت وحتوهلــا اىل اجلهــة اجلنوبيــة، حيــث زادت مســاحة الغطــاء النبــايت اﻹمجاليــة يف منطقــة الدراســة بــني عامــي 1988 و 1999 بنســبة %،7.7 بينمــا اخنفضــت هــذه النســبة مبقــدار %1.5 علــى طــول الســاحل يف نفــس الفــرتة،