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ISSN 2616-3926 Volume 1 Issue 1, February 2018 ISSN 2616-3926 Bhutanese Journal of Agriculture is registered with the ISSN International Centre, Located in Paris 75003 (France), 45 rue de Turbigo. Editor -In-Chief Mr. Mahesh Ghimiray, Specialist II, Agriculture Research and Development Centre (ARDC), Bajo Editorial Board Mr. Tirtha Bdr. Katwal, Specialist III, ARDC-Yusipang Dr. Yadunath Bajgai, Principal Research Officer, ARDC-Yusipang Dr. Tshering Dorji, Principal Agriculture Officer, National Soil Services Centre, Semtokha Ms. Phub Dem, Principal Agriculture Economist, Policy and Planning Division, MoAF, Thimphu Mr. Lhap Dorji, Program Director, ARDC-Wengkhar Member Secretary Mr. Wangda Dukpa, Chief, Agriculture Research and Extension Division, Department of Agriculture (DoA), Thimphu Journal Focal Ngawang, Agriculture Officer, Agriculture Research and Extension Division, Department of Agriculture (DoA), Thimphu Editorial Correspondence The Bhutanese Journal of Agriculture welcomes the submission of research articles and short communications. Article may be submitted to [email protected] or [email protected]. Please follow the journal format, which the author guidelines are accessible from www.moaf.gov.bt or contact at +975-2-322228/331316. Publisher Agriculture Research and Extension Division, Department of Agriculture, Ministry of Agriculture and Forests, Thimphu: Bhutan Post Box 113, Postal Code 11001 Journal Design & Format by: Mr. Ngawang, Agriculture Research and Extension Division, DoA, Thimphu Printing Company United Printing Press, Thimphu: Bhutan Copyright © Department of Agriculture, 2018 Ministry of Agriculture and Forests, Royal Government of Bhutan A part or whole of this publication may be reproduced or disseminated with proper acknowledgement to the above address. Readers are encouraged to send comments or feedback on articles in this journal for future improvement. ii Volume 1 Issue 1, February 2018 ISSN 2616-3926 Royal Government of Bhutan BHUTANESE JOURNAL OF AGRICULTURE Agriculture Research and Extension Division, Department of Agriculture, Ministry of Agriculture and Forests, Thimphu: Bhutan iii The first volume of the Bhutanese Journal of Agriculture is launched to commemorate the 38th Birth Anniversary of His Majesty the 5th King Jigme Khesar Namgyal Wangcuck, 2018 iv FOREWORD The Department of Agriculture is pleased to publish the first ever version of "Bhutanese Journal of Agriculture". Under the scope of Council for RNR Research of Bhutan (CoRRB), the ministry published the "Journal of Renewable Natural Resources of Bhutan" until 2014 encompassing research findings from all departments within the ministry. After the dissolution of CoRRB, the mandate for agriculture has been transferred to Agriculture Research and Extension Division under Department of Agriculture. We are delighted to revive the publication that will compile research findings primarily from agriculture sector. The Bhutanese Journal of Agriculture is initiated to provide a platform for researchers to share their findings to wider audience for work conducted in Bhutan. The journal is expected to motivate Bhutanese researchers and field colleagues to develop a habit of scientific writing and contribute to knowledge management. Through proper documentation, the work can be used for future reference and avoid reinventing the wheel. We envisage that the research findings will lead to transfer of technologies for adoption by farmers. I would like to thank the authors for their contribution and the reviewers for their critical feedback. Furthermore, I would like to extend my appreciation to the Editor-in-Chief and team for successful publication of the journal. Over time, we must strive to attain international standard of our articles. Tashi Delek! Kinlay Tshering (Ms.) Director i EDITORIAL We are indeed delighted to publish the inaugural issue of the Bhutanese Journal of Agriculture (BJA). The void in the publication of scientific papers on agriculture, created after the abolition of the Council for RNR Research of Bhutan (CoRRB) which used to publish the RNR Journal of Bhutan, will expectantly be filled by BJA. Unlike the RNR Journal, BJA exclusively focuses on agricultural research and development; agriculture connotes field crops (food cereals, oil crops and grain legumes) and horticulture (fruits, vegetables and spices) in our context. This edition of the BJA includes articles on food crop agronomy, variety evaluation and development, propagation methods in fruit plants, participatory vulnerability assessment, economic analysis of crop production as well as processing. Climate change is increasingly becoming a germane and imperative topic of study and discussion. Two papers on the potential impact of climate change on horticultural production and rice crop suitability model under the future climate scenario make interesting reading. Aeroponics, a relatively new technique in Bhutan, is successfully demonstrated to produce potato mini-tubers. Likewise, community based seed production of maize; introduced only in recent years has helped farmers in the East to improve their livelihood through enhanced quality of seed, bigger harvest and thus additional income. Phenotypic characterization and diversity studies on banana and common beans reflect another dimension of crop breeding and variety development. Apart from articles on biological science, the journal also contains a social science paper on the evaluation of a JICA-implemented horticulture project in Eastern Bhutan and how it helped farmers to boost their happiness level. BJA provides the perfect platform for our young researchers and agricultural extension and development workers to showcase their work and achievement not only to the scientific community but also to a larger audience of policy formulators, decision makers and those responsible for our career advancement. In today‘s competitive world, scientific publications matter in contending for a scholarship or a job outside the civil service. Thus, we have to cultivate the habit of writing and instil the zeal of publishing, as never before. Indolence and apathy are no more bliss or bearable attitude. The journal also serves as a powerful vehicle for advancement of agricultural science and dissemination of technologies. We encourage contributions in any field, whether biological, social or economic, which will aid in our understanding of agriculture. We wish you a very happy reading. Mahesh Ghimiray Editor-in-Chief ii ABOUT THE JOURNAL The Bhutanese Journal of Agriculture (BJA) founded in 2017 is published by the Agriculture Research and Extension Division, Department of Agriculture, Ministry of Agriculture and Forests. The journal will publish quality research articles annually. It is an open access English language journal on Agriculture and financed by the Royal Government of Bhutan. It aims to provide a coherent mechanism through which appropriate technologies, information and knowledge in the agriculture sector can be generated and made available to clients. The BJA focuses mainly on original and innovative scientific research relevant to sustainable development of agricultural sector in Bhutan. The papers addresses a scientific community interested in agriculture, and cross-cutting themes including; markets, biodiversity, irrigation/water, soils, farming systems and, climate change aspects of sustainable agriculture development in Bhutan. The journal article structure conforms to scientific standards. Results are critically analyzed and objectively presented. The standard guide to authors of BJA is attached at the end of this book. BJA does not charge any fee for submission of articles. Once the Department of Agriculture‘s webpage is developed, the online publications will have Open Access. Bhutanese Journal of Agriculture (BJA) Volume 1 Issue 1 ISSN 2616-3926 Agriculture Research and Extension Division, Department of Agriculture, Ministry of Agriculture and Forests, Thimphu: Bhutan iii CONTENTS FOREWORD .............................................................................................................................. i EDITORIAL .............................................................................................................................. ii ABOUT THE JOURNAL ........................................................................................................ iii Participatory varietal selection of potato and agronomic performance with farmers‘ feedback on new varieties .................................................................................................................... - 1 - Effects of different planting methods on rice (Oryza sativa L.) crop performance and cost of production ........................................................................................................................... - 13 - Potato mini-tuber production using an Aeroponics System during winter ......................... - 23 - Potential Impact of Climate Change on the Scope of Important Fruit Crops ..................... - 35 - Evaluation of Potting Mix on the Growth of Container-Grown Trifoliate Orange (Poncirus trifoliata) ............................................................................................................................. - 43 - Crop suitability modeling for rice under future climate scenario in Bhutan ...................... - 49 - Economic analysis of spring rice production at Rinchengang, Wangduephodrang ........... - 58 - Cost analysis of operating a medium