Effects of wall linings on moisture ingress into traditional grain storage pits |
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Authors: | el-Tayeb Abdalla A Stigter C J Mohamed H A Mohammed A E Gough M C |
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Institution: | (1) TTMI-Project, Department of Environmental Sciences and Natural Resources, University of Gezira, P.O. Box 20, Wad Medani, Sudan, SD;(2) TTMI-Project, Department of Environmental Sciences, C.T. de Wit Graduate School of Production Ecology, Wageningen University, Duivendaal 2, 6701 AP Wageningen, The Netherlands e-mail: kees.stigter@user.metair.wau.nl Fax: +31-317-482811, NL;(3) 40 Cherry Orchard, Chestfield, Whitstable, CT5 3NH, Kent, England, UK, GB |
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Abstract: | Increasing climate variability, resulting in frequent years of poor rainfall, has recently subjected the traditional subsistence
farmers in the Central Clay Plain of the Sudan to longer periods of food shortage. However, excess production in years of
good rainfall could bridge the gap of years with poor rainfall if the grain is properly stored. Resource-poor farmers have
tried several linings to improve the traditional underground pit (”matmura”) they use for storage of sorghum. In the experimental
study described here, pits with two types of lining: (i) a mixture of mud, cow dung and straw and (ii) sorghum chaff, were
compared with unlined pits. Six closed pits were used, two for each type, and temperature and moisture content were monitored.
It was found that the temperature increased in all pits and at all positions within the pits, with few differences between
the linings. Moisture levels also increased everywhere but the sources of moisture were at the sides and bottoms of the pits.
The chaff-lined pits were superior to the others because they showed smaller increases in moisture content at all positions
and thus maintained a better quality of sorghum. Joint traditional assessments with local farmers after the pits were opened
supported these findings.
Received: 15 March 2000 / Revised: 4 January 2001 / Accepted: 10 January 2001 |
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Keywords: | Grain storage Pit grain storage Sorghum grain Underground grain storage |
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