Address: G-9, Natural Resource Management,
ICAR - CCARI,
Old Goa 403 402
Phone: 832-2284678 Ext. 109
Ph. D. from Indian Agricultural Research Institute, New Delhi, 2012
M.Sc., Agri. from Banaras Hindu University, Varanasi, Uttar Pradesh, 2009
B.Sc., Agri., from Mahatma Phule Krishi Veidyapeeth, Rahuri, Maharashtra, 2007
Research interests and current focus
Soil fertility and plant nutrition, management of salt-affected soils, spectroscopy of soils and plant nutrients, integrated farming systems, soil and water conservation.
Current focus :
1. Coastal soil salinity and its management to improve its productivity
2. Spectroscopy based assessment of soil properties and foliar nutrients in crops
3. Integrated farming system
Outreach and Extension
Weather based Agroadvisory services for districts of North Goa and South Goa of State of Goa.
SHC Goa: Soil Health Card - an android mobile phone app for soil health card (Co-partner with ICAR-NBSSLUP, Nagpur): Developed through a RKVY, Govt. of Goa funded collaborative research project by ICAR-NBSSLUP, Nagpur as lead center and ICAR-CCARI, Old Goa as collaborating center.
Land Resource Inventory System - LRIS Goa – an android mobile phone app for land resource information of Goa (Co-partner with ICAR-NBSSLUP, Nagpur): Developed through a RKVY, Govt. of Goa funded collaborative research project by ICAR-NBSSLUP, Nagpur as lead center and ICAR-CCARI, Old Goa as collaborating center.
STFR Goa – An online webportal on Soil test based fertilizer recommendations for Goa: Development of e-resources for nutrient management in different crops of Goa. An online programme to get soil health status at a village level and fertilizer recommendations has been developed – STFR Goa. Link to visit webpage:
Fertilizer calculator – New! - Developed a mobile (android platform) app for making soil test based fertilizer recommendations for different crops irrespective of area. Link to download the app –
Fertilizer Calculator Goa - Developed a mobile (android) app for making soil test based fertilizer recommendations for important crops of Goa. Link to download the app –
Advisories to the farmers and other stakeholders on problems related to nutrient management.
Training and awareness programmes on soil testing and soil test based nutrient management in different crops.
Memberships of professional societies
1. Indian Society of Soil Science, New Delhi, India.
2. Association of Coastal Agricultural Research, ICAR - CCARI, Old Goa, Goa, India.
3. Indian Science Congress Association, Kolkata. India.
4. Indian Society of Soil Salinity and Water Quality (ISSSWQ), Karnal, Haryana, India.
Awards and honours
Best Poster Presentation Award for the paper – Desai S, Das B, Sreekanth GB, Mahajan GR (2021) Assessment of long-term trends in stream flow of river basins flowing in the West Coast of India, International Symposium on Coastal Agriculture (ISCA Webinar): Transforming Coastal Zone for Sustainable Food and Income Security organized in virtual mode during March 16-19, 2021
Tuition scholarship 2019 ($2770) to attend a training program on ‘Environmental Management’ at Galilee Institute of Management, Nahalal, Israel from 10-23 September 2019.
Early Career Research Award 2017-18, Science and Engineering Research Board, Department of Science and Technology, Ministry of Science and Technology, Government of India, India
International Plant Nutrition Institute's (IPNI) 2015 photo contest for crop nutrient deficiency symptoms Award by International Plant Nutrition Institute, Georgia, USA
ICAR Jawaharlal Nehru Award for Postgraduate Outstanding Doctoral Thesis Research in Agricultural and Allied Sciences 2013 by Indian Council of Agricultural Research, New Delhi
BC Fertilis Nutrient Deficiency Photo contest 2014 in the Photo contest on symptoms of nutrient deficiencies and excess in agricultural crops, BC Fertilis, Spain
ISSS Best Doctoral Research Presentation Award 2013 by Indian Societ of Soil Science (New Delhi) during 78th Annual Convention of Indian Society of Soil Science during 23rd-27th, October, 2013 held at CAZRI, Jodhpur.
Dr. S. P. Raychaudhari Gold Medal 2012-13 by Delhi Chapter of Indian Society of Soil Science, New Delhi.
International Plant Nutrition Institute's (IPNI) 2013 photo contest for crop nutrient deficiency symptoms Award by International Plant Nutrition Institute, Georgia, USA
International Plant Nutrition Institute Scholar Award – 2011 by International Plant Nutrition Institute, Georgia, USA.
Student’s scholarship for attending the 5th International Nitrogen Conference - 2010, New Delhi, India.
Senior Research Fellowship - 2011, Indian Council of Agricultural Research, New Delhi, India.
Students scholarship to attend International Nitrogen Conference 2010 of International Nitrogen Initiative at New Delhi, India
Junior Research Fellowship - 2007, Indian Council of Agricultural Research, New Delhi, India.
Academic/ Student advising
Guided 1 M.Sc. and 6 undergraduation students for a internship training programmes of 1 to 2 months.
Guided 60 students for a two to four-month exposure activity on the laboratory analysis
Co-coordinator - One month Orientation Training of three newly joined scientist Newly joined ICAR-ARS scientist at ICAR-CCARI, Old Goa, Goa during April-May 2016
Coordinator - Field Experience Training, A team of six newly joined ICAR-ARS scientists, 103rd FOCARS from NAARM, Hyderabad, India
Co-coordinator, One month orientation training of newly joined scientist at ICAR-CCARI, Old Goa, Goa during Oct-Nov 2016.
Mahajan GR, Manjunath BL, Morajkar S, Desai A, Das B, Paramesh V (2021). Long-term effect of various organic and inorganic nutrient sources on rice yield and soil quality in west coast India using suitable indexing techniques. Communications in Soil Science and Plant Analysis, DOI: 10.1080/00103624.2021.1900221
Paramesh V, Chakurkar EB, Bhagat T, Sreekanth GB, Chetan Kumar HB, Rajkumar S, Gokuldas PP, Mahajan GR, Manohara KK, Ravishankar N (2021) Impact of integrated farming system on residue recycling, nutrient budgeting and soil health. Indian Journal of Agricultural Sciences 91 (1): 44–8.
Mahajan GR, Das, B, Murgaokar D, Herrmann I, Berger K, Sahoo RN, Patel KP, Desai A, Morajkar S, Kulkarni RM (2021) Monitoring the foliar nutrients status of mango using spectroscopy-based novel spectral indices and PLSR-combined machine learning models. Remote Sensing Remote Sens. 2021, 13(4), 641; https://doi.org/10.3390/rs13040641.
Mahajan GR, Das B, Gaikwad B, Murgaonkar D, Morajkar S, Desai A, Patel KP, Kulkarni RM (2020) Monitoring properties of the salt-affected soils by multivariate analysis of the visible and near-infrared hyperspectral data. Catena, 198: 105041. DOI: 10.1016/j.catena.2020.105041.
Mahajan GR, Das B, Manivannan S, Manjunath BL, Verma RR, Desai S, Kulkarni RM, Latare AM, Sale R, Murgaonkar D, Patel KP, Morajkar S, Desai A, Barnes N (2020) Soil and water conservation measures improve soil carbon sequestration and soil quality under cashews. International Journal of Sediment Research. 36(2): 190-206. DOI: 10.1016/j.ijsrc.2020.07.009.
Mahajan G R, Das B, Morajkar S, Desai A, Murgaokar D, Kulkarni R M, Sale R, Patel K (2020). Soil quality assessment of coastal salt-affected acid soils of India. Environmental Science and Pollution Research. Accepted for publication. DOI: 10.1007/s11356-020-09010-w.
Paramesh V, Sreekanth GB, Chakurkar EB, Chetan Kumar HB, Gokuldas PP, Manohara KK, Mahajan GR, Rajkumar RS, Ravisankar N, Panwar AS (2020) Trophic network and ecosystem network analysis in a smallholder integrated crop-fish-livestock system for coastal lowland situation in tropical humid conditions of India. Sustainability (Accepted for publication).
Mahajan GR, Pandey RN, Datta SC, Kumar D, Sahoo RN. (2019) Monitoring Wheat (Triticum aestivum L.) Leaf Nitrogen using Diagnostic Tools for Fertilizer Nitrogen Management. Journal of the Indian Society of Soil Science. 67(3):329-40.
Das B, Manohara KK, Mahajan GR, Sahoo RN (2020) Spectroscopy based novel spectral indices, PCA-and PLSR-coupled machine learning models for salinity stress phenotyping of rice. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 229:117983.
Paramesha V, Ranjan Parajuli, E.B. Chakurkar, G.B. Sreekanth, H.B. Chetan Kumar, P.P. Gokuldas, Mahajan GR, K.K. Manohara, Reddy K. Viswanatha, N. Ravisankar (2019) Sustainability, energy budgeting and life cycle assessment of crop- dairy-fish-poultry mixed farming system for coastal lowlands under humid tropic condition of India. Energy. 188: 116101. DOI: https://doi.org/10.1016/j.energy.2019.116101.
Mahajan GR, Pandey RN, Datta SC, Sahoo RN, Dinesh Kumar, Murgaonkar D, Patel K (2019). Predicting post-harvest soil test values in hybrid rice (Oryza sativa L.) – wheat (Triticum aesitvum L.) cropping sequence using a multivariate analysis technique. Communications in Soil Science and Plant Analysis. Accepted for publication. 50:13, 1624-1639, DOI: 10.1080/00103624.2019.1631328.
Proceeding of National Academy of Sciences India, Section B Biological Sciences. Published online. 88(4): 1531-1538.
Manjunath BL, Paramesh V, Mahajan GR, Das B, Reddy VK, Chakurkar EB, Singh NP (2017). Sustainability through resource recycling, soil Fertility and carbon sequestration from integrated Farming systems in west coast India. The Bioscan 13(1): 27-32.
Mahajan GR, Manjunath BL, Latare AM, Ruenna D’Souza, Shashi Vishwakarma, N. P. Singh (2015) Fertility Status of the Unique Coastal Acid Saline Soils of Goa. Journal of the Indian Society of Soil Science. 63(2): 232-237.
Mahajan GR, Manjunath BL, Latare AM, Ruenna D’Souza, Shashi Vishwakarma, N. P. Singh (2015) Microbial and Enzyme Activities and Carbon Stock in Unique Coastal Acid Saline Soils of Goa. Proceeding of National Academy of Sciences India, Section B Biological Sciences, 86(4): 961-971. DOI 10.1007/s40011-015-0552-7.
Mahajan GR, Sahoo RN, Pandey RN, Gupta VK, Dinesh Kumar (2014). Using hyperspectral remote sensing techniques to monitor nitrogen, phosphorus, sulphur and potassium in wheat (Triticum aestivum L.). Precision Agriculture, 15(2): 227-240.
Mahajan GR, Pandey RN, Datta SC, Dinesh Kumar, Sahoo RN, RajenderParsad (2014). Fertilizer nitrogen, phosphorus and sulphur prescription for aromatic hybrid rice (Oryza sativa L.) using targeted yield approach. Proceedings of National Academy of Sciences of India, Section B Biological Sciences, 84(3): 537-547.
Mahajan GR, Pandey RN, Dinesh Kumar, S. C. Datta, R. N. Sahoo, RajenderParsad (2014) Development of critical values for the leaf color chart, SPAD and Fieldscout CM 1000 for fixed time adjustable nitrogen management in aromatic hybrid rice (Oryza sativa L.). Communications in Soil Science and Plant Analysis 45(14): 1877-1893.
Mahajan GR, Pandey RN, Datta SC, Dinesh Kumar, Sahoo RN, RajenderParsad (2013). Soil Test Based Fertilizer Recommendation of Nitrogen, Phosphorus and Sulphur in Wheat (Triticumaestivum L.) in an Alluvial Soil. International Journal of Agriculture, Environment & Biotechnology, 6(2): 271-281.
Book and Book Chapters
Chakurkar EB, Desai AR, Thangam M, Manohara KK, Shivasharanappa N, Gokuldas PP, Rajkumar RS, Mahajan GR, Susitha R, Vishwanath Reddy K, Sreekanth GB, Das B, Paramesh V, Desai S, Chethan Kumar HB, Mayekar T, Nayak N (2020). Coastal Agricultural Resource Inventory: An Overview and Way Forward. ICAR – Central Coastal Agricultural Research Institute, Old Goa, Goa, India. ISBN-978-93-5406-829-4.
Mahajan GR, Das B, Gaikwad B, Murgaokar D, Patel K, Kulkarni M (2020). Spectral and Smartphone-Based Tools to Monitor Plant and Soil Nitrogen Status for Site-Specific N Management in Crop Plants. Mandal N, Dey A, Rakshit (eds.) R: Soil Management for Sustainable Agriculture - New Research and Strategies. CRC Press Taylor and Francis Group. Apple Academic Press.
Bappa Das, Gopal R. Mahajan, and Ronald Singh (2018). Hyperspectral Remote Sensing: Use in Detecting Abiotic Stresses in Agriculture. S. K. Bal et al. (eds.), Advances in Crop Environment Interaction, https://doi.org/10.1007/978-981-13-1861-0_12.
Singh NP, Mahajan GR and Das SK (2017). Integrated Farming System Model for Lowland Situations of West Coast of India. Book - Integrated Farming Systems for Sustainable Agriculture and Enhancement of Rural Livelihoods. Muralidharan K, Prasad MVR and Siddiq EA (Eds). Retired ICAR Employees' Association, and ICAR-NAARM, Hyderabad 500060
Mahajan GR and Ramesh R (2021). Methods of application of Goa Bio 1: A bioformulation for plant growth promotion of paddy under salt-affected soils of coastal regions. ICAR – central Coastal Agricultural Research Institute, Old Goa, Goa, India, Extension leaflet no. 09/2021.
V. Paramesha, E.B. Chakurkar, B.L. Manjunath, G. R. Mahajan, S.K. Das, A.R. Desai, S. Priya Devi, Chetan Kumar, H.B. Gokul Das P.P, Manohara, K.K., N. Ravisankar, K. Viswanatha Reddy, S. Rajkumar, Rahul M Kulkarni and N. P. Singh. (2019), Plantation crop based integrated farming system for upland agroecosystem of Goa. Technical Bulletin No: 66, ICAR-Central Coastal Agricultural Research Institute, Ela, Old Goa-403 402, Goa, India.
Manju Lekshmi N, Sreekanth GB, Mahajan GR, Rohita Naik, Sudheer Kumar, Purva Rivonkar, Chakurkar EB (2019) Fisheries laboratory manual, ICAR-CCARI Manual 2019/1, ICAR – Central Coastal Agricultural Research Institute, Old Goa – 403402, Goa, India. Pp. 1-48.
Chakurkar EB, Gokuldas PP, Shivasharanappa N, Mahajan GR (2018). Technologies of ICAR-CCARI. Technical Bulletin, 66/2018. ICAR-CCARI, Goa, India. pp.1-20.
Ramesh R and Mahajan GR (2018). Goa Bio 1: Bioformulation for plant growth promotion of paddy under salt-affected soils of coastal region. ICAR – central Coastal Agricultural Research Institute, Old Goa, Goa, India, Extension leaflet no. 01/2018.
B. L. Manjunath, V. Paramesha, G. R. Mahajan, E.B. Chakurkar, S.K. Das, B. K. Swain, S. Subramanian, A. R. Desai, N.P. Singh, S. Priya Devi, G. B. Sreekanth and K. Viswanatha Reddy (2017). Rice based integrated farming system for lowland agroecosystem of Goa, Technical Bulletin No: 62.
G.R. Mahajan, Bappa Das, B.L. Manjunath, Viswanatha Reddy K., S. Manivannan, R.R. Verma, N.P. Singh (2016). Weather trends of last fourteen years (2002-2015) at ICAR – Central Coastal Agricultural Research Institute, Old Goa Technical Bulletin No 61, ICAR-Central Coastal Agricultural Research Institute, Old Goa – 403 402, Goa, India. (The technical bulletin has been published as soft form (CD).
Mahajan GR, Prajapati V, Vishwakarma S, Kulkarni R (2015) A guide to use soil test-based fertilizer recommendation to Goan crops (STFR Goa). A training manual, ICAR-CCARI, Old Goa, Goa.
Mahajan GR, Gaonkar G, Ubarhande V, Kulkarni R, Vishwakarma S (2015) Soil testing and balanced use of fertilizers. Extension leaflet, ICAR CCARI, Old Goa, Goa
महाजन गो रा, गावकर वि, उंबरहांडे वि, विश्वकर्मा श, कुलकर्णी रा (२०१५) माती परीक्षण आणि खतांचा समतोल वापर. विस्तार पत्रक, भा कृ अनु प - केंद्रीय किनारी कृषी संशोधन संस्था, गोआ.
Manjunath BL, Mahajan GR and Singh NP (2013). Lecture notes of Short course on “Integrated Farming System Research for Improved Livelihood Option of Small and Marginal Farmers”. ICAR Research Complex for Goa, Old Goa – 403402, Goa, India.
Ramesh R, Manjunath BL, Maruthadurai R, Mahajan GR, Singh NP (2013). Water melon production Guidelines - Extension Folder No. 64/ 2013. ICAR Research Complex for Goa, Old Goa.
Ramesh R, Manjunath BL, Maruthadurai R, Mahajan GR, Singh NP (2013). Cowpea production Guidelines - Extension Folder No. 65/ 2013. ICAR Research Complex for Goa, Old Goa.
Databases, software, portals, apps
STFR Goa: Soil Test based Fertilizer Recommendations Goa – An online webportal
Decision Support System for State of Goa
Android mobile phones apps for agricultural input management developed for farmers, researchers and other stakeholders
Fertilizer calculator Goa
Fertilizer calculator – NEW!
Nutrient to fertilizer calculator
Plant population calculator