Tajas Vol.18 No.1 June 2019
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An International Journal of Basic and Applied Research (TAJAS) June, 2019 Vol. 18 No. 1 www.sua.ac.tz ISSN 0856-664X Published by: College of Agriculture Division of Research & Dev. Sokoine University of Agriculture Ministry of Agriculture, Morogoro, Dar es salaam Tanzania www.coa.ac.tz/college_agriculture TANZANIA JOURNAL OF AGRICULTURAL SCIENCES June, 2019 Vol. 18 No. 1 ii Tanzania Journal of Agricultural Sciences Editor- in-Chief Prof. C.N. Nyaruhucha Department of Food Technology, Nutrition and Consumer Sciences, SUA. Deputy Editor- in-Chief Dr H. Tindwa Department of Soil Science Sokoine University of Agriculture, Morogoro Dr. J.M. Nkuba MALF Editorial Advisory Board Prof. S. Deckers KU Leuven, Belgium Dr. H. Tindwa Department of Soil and Geological Sciences, Sokoine University of Agriculture, Morogoro Dr. J.M. Nkuba MALF Prof. M. Erbaugh OSU, USA. Prof. D. Mwaseba Dept. of Agric. Extension and Community Development, SUA, Morogoro Prof. L.O. Eik UMB, NORWAY. Dr. G. Rwegasira Department of Crop Sciences and Horticulture, SUA, Morogoro Dr. D.M. Komwihangilo TALIRI, Mpwapwa, Dodoma . Dr. A. Shoko TAFIRI, Dar es Salaam Dr. C.Z. Mkangwa ARI – Mlingano, TANGA Dr. L.M. Chove Dept. of Food Technology, Nutrition and Consumer Sciences, SUA. The Scientific/Technical Editors Sub-committee of Tanzania Journal of Agricultural Sciences Dr. T. Jumbe Dept. of Food Technology, Nutrition and Consumer Sciences, SUA, Morogoro. Dr. B. Msangi Commission for Science and Technology (COSTECH), Dar es Salaam. Prof. P. Kusolwa Department of Crop Sciences and Horticulture, SUA, Morogoro. Prof. F. Kahimba Department of Engineering Sciences and Technology, SUA, Morogoro Dr. D. Mushi Department of Animal Aquaculture and Range Sciences, SUA, Morogoro Promotion Committee Dr. N. Madalla Department of Animal Aquaculture and Range Sciences, SUA. Dr. S. Kashenge ARI Cholima, MALF Dr. T. Kaijage MALF Prof. R. Haug NMBU, Norway Mrs. J. Mkindi TAHA, Arusha Consulting Editors: Senior scientists in various fields of agricultural sciences within and outside the country shall act as peer reviewers of scientific manuscripts submitted to the Journal. General Information Aims and Scope:- Tanzania Journal of Agricultural Sciences is a peer reviewed scientific journal that publishes original and scholarly research articles dealing with fundamental and applied aspects of Agriculture, Food Aquaculture and Wildlife. Occasionally invited review articles will be published as well. Frequency of Publication Tanzania Journal of Agricultural Sciences will be published twice a year, one volume a year. The first issue will be published in June and the second in December of each year. Subscription Tanzania Shillings 88,000 or US $ 40 per issue. Price per issue is TZS 60,000 (Tanzania Institutions), T.Shs. 30,000 (Tanzania Scientists), TZS. 88,000 (Foreign subscribers) and should be sent to: Editor-In-Chief, TAJAS, Sokoine University of Agriculture, P. O. Box 3000, Morogoro, Tanzania; E-mail address: [email protected] An International Journal of Basic and Applied Research Table of Contents iii Economic Efficiency Analysis of Dairy Farmers Participating in Dairy Market Hubs in Tanga and Morogoro regions, Tanzania........................................................................................1 Bayiyana, I., A. Hepelwa and E.J.O. Rao Increased Productivity in Tanzanian Cattle is the Main Approach to Reduce Methane Emission per Unit of Product..........................................................................................................14 Weisbjerg, M.R., Terkelsen, M., Hvelplund, T., Lund, P. and Madsen, J. Weather Related Challenges and Transitory Food Insecurity in Semiarid Mixed Crop-Livestock Systems in Manyoni District, Tanzania................................................................22 Urassa, N.S. and E.Y. Swai Determinants of Yam Production and Resource use Efficiency under Agroforestry System in Edo State, Nigeria......................................................................................................35 Idumah, F.O. and P.T. Owombo Technical Note on Promoting Integrated Soil, Water and Nutrient Management Technologies in Southern Highlands Zone of Tanzania..................................................................43 Mzimbiri, M.K., J.U.Z. Malley, and W.N. Mmari Tanzania Journal of Agricultural Sciences (2019) Vol. 18 No. 1 iv Editorial he College of Agriculture (CoA) formerly known as Faculty of Agriculture (FoA) of the TSokoine University of Agriculture (SUA) has been in existance for over 30 years. Among its major responsibilities is to provide research leadership in all aspects of agriculture and food. In order to discharge this national responsibility, scientists in the College work closely with colleagues in other Colleges and the Ministry of Agriculture, Livestock and Fisheries (MALF). This close collaboration between SUA and MALF in enhancing agricultural development has been the main drive behind the initiative to start this point publication of the Tanzania Journal of Agricultural Sciences. The Tanzania Journal of Agricultural Sciences (TAJAS) endeavors to bring together academic contributions in the field of agriculture in its broad term with the main aim being to: ■ Focus on and foster the science of agriculture ■ Provide a new leading source of information and knowledge in all fields of agriculture. Thus, TAJAS provides a platform and outlet of publications for scientists, researchers and scholars in the field of agriculture. The scope of TAJAS encompasses original research (basic and applied), comprehensive up-to-date reviews and technical notes. The development of this journal is the result of interest and tireless effort by many scientists from CoA and MALF. The Technical Editors subcommittee, the Editorial Advisory Board, the Promotion Subcommittee and peer reviewers have great responsibility towards the shaping and the growth of the journal. The Editor-in-Chief is deeply grateful to these persons for their work. The contents and the extent of this journal will be determined by what the subscibers and contributors want and need. Your constant comments will assist in improving the journal and earn your growing respect. It is the hope of CoA, MALF and the Editors that TAJAS will meet the expectations of the local, regional and International scientific community in the field of agriculture and applied sciences. Prof. C.N. Nyaruhucha Editor-in-Chief An International Journal of Basic and Applied Research Economic Efficiency Analysis of Dairy Farmers Participating in Dairy Market Hubs in Tanga and Morogoro regions, Tanzania *Irene Bayiyana1, Aloyce Hepelwa1 and Elizaphan J.O. Rao2 1University of Dar es Salaam, Department of Economics 2International Livestock Research Institute (ILRI) *Corresponding author’s e-mail address: [email protected] Abstract The regular supply of reliable quality milk may call for a hub approach where dairy services are clustered around a milk buyer under some form of contractual agreement. However, empirical evidence on the economic efficiency of hub participating farmers is limited. The objective of this study is to determine the economic efficiency of dairy farmers participating in dairy market hubs (DMHs). The study uses secondary data collected from 384 smallholder dairy farmers in Tanga and Morogoro regions and employs stochastic frontier translog cost model to estimate the level of economic efficiency among smallholder dairy farmers participating in DMHs. Results indicate that economic efficiency index ranged from 0.003-0.999 with a mean of 0.932 points implying that the sampled farmers were close to being fully economically efficient in the allocation of resources for producing a given level of milk output. Key factors indirectly related to cost inefficiency were education level, age, hub membership, and farmer location. These results indicate that new entrants especially the youths need to be encouraged to rear dairy cows. In addition, there is a need to provide farmers with basic information through trainings on profitable dairying, better technology and practices so as to improve their knowledge and skills. Keywords – Dairy market hub, economic efficiency, smallholder, stochastic frontier Introduction might also have impacts on economic efficiency airy farming is an important livelihood and farm productivity; aspects which have not Doption for many poor rural households in been sufficiently analyzed for less and pre- the developing world, providing an important commercial dairy farmers so far. source of nutrients (Chandio et al., 2017) (Duncan et al., 2013; Thorpe et al., 2000) Compared to extensive dairying, intensive dairy and contributing to household incomes (Rao production often entails more sophisticated et al., 2016). Even though dairying offers planning and use of inputs, which could promising opportunities to combat poverty, positively influence cost/economic efficiency there is a significant risk that dairy development (Omore 2013). Economic efficiency is crucial will exclude smallholder poor farmers such to production, marketing and trade (Karamagi, as women (Mishkin et al., 2018) (Rota, 2002). Economic efficiency is a composite 2009). Developed and emerging nations have product of technical and allocative efficiency intensified milk production in order to reap the (Adesina and Djato, 2008). Hence, economic benefits of economies of scale while in many efficiency is defined as the firm’s capacity developing countries, milk production remains to produce a given amount