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postharvest losses in the Wheat Logistics Chain： A Brazilian Case Study

Journal of Agricultural Science and Technology(B) 2016年第5期6卷 321-329页

作者： Daniela Bacchi Bartholomeu Femando Vinlcius da Rocha Thiago Guilherme Pera Jose Vicente Caixeta-Filho Research and Extension Group in Agroindustrial Logistics (ESALQ-LOG) University of Sao Paulo (USP) Piracicaba Sao PauloPostal Code 13418-900 Brazil

This paper highlighted the losses occurring along the wheat supply chain in Rio Grande do Sul （RS）, Brazil, which accounts for almost half of the domestic wheat production. Based on a field research, a questionnaire was applied to representative agents in the market. Then the wheat supply chain in the state of RS was characterized and loss rates in each stage of that chain were quantified. Typically, losses during transportation in the domestic market account for about 11.8% of the total amount of wheat grain that leaves the farms. losses during harvest and storage in cooperatives, which account for 93.2% of total losses, stand out in this context. Transportation operations account for 6.8% of total losses in the analyzed flow. Based on the results obtained in this study, strategies are suggested to reduce food losses in different links of the logistics chain, such as to evidence and quantify the wheat losses, to manage losses and set reduction targets and to give attention to transportation service levels.

关键词： postharvest losses wheat supply chain food security

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Combine Harvester: Small Machine Solves Big Rice Harvesting Problem of Bangladesh

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Agricultural Sciences 2022年第2期13卷 201-220页

作者： Bidhan Chandra Nath Subrata Paul Md Durrul Huda Md Anwar Hossen MGK Bhuiyan AKM Saiful Islam Bangladesh Rice Research Institute Gazipur Bangladesh

Bangladesh, a country with 87% of rural households that depend on agriculture and rice dominated diets (70%), engages the country’s food security. Therefore, there is strong advocacy for a mechanized paddy harvesting system for food security in South Asia, mainly Bangladesh. Some harvesting machinery is available;however, the precise roles of a combine harvester during this process are little. This study attempts to understand the consequences of combining harvesters for paddy harvesting and compare them with hand harvesting. For comparison of field performance of combine harvester with traditional harvesting, the experiment was conducted at Gazipur District, Bangladesh, in 2016. Results showed that the labor required for harvesting unit area 283, 15 and 9.87 man-h∙ha−1 for T1 (Sickle + Head carry + Beating + Kula), T2 (Reaper + Trolley carry + Close drum thresher + winnower), T3 (Combine harvester) system, respectively. Likewise, the harvesting costs were 1.84 (T2) and 2.5 (T1) times higher than the combine harvester (T3). Also, the postharvest loss can be saved 1.84%, to use combine harvester over manual harvesting of paddy. The above result revealed that the semi-mechanized and mechanized harvesting system is a time, labor and cost-saving system;however, the manual reaping system is concerned with more postharvest losses (3.09%). This study highlights the importance of combine harvester;however, further research is required in other places with large and mini-combine harvesters under diverse cropping areas and to test a combine harvester’s detailed potentiality.

关键词： Combine Harvester Harvesting Labor Paddy postharvest losses

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