Methodology for assessing determinants of manure use in urban areas of Africa

P Suman, E Thys, A Mfoukou-Ntsakala, L Ali, M Ouedraogo, P Van den Bossche, G Van Huylenbroeck, D Berkvens, N Speybroeck

    Research output: Contribution to journalA1: Web of Science-article

    Abstract

    The objectives of this study were to identify the major determinants (e.g. zootechnical and socio-economic parameters) of manure management practised by urban livestock keepers. Data were collected from four single-visit, multi-object surveys in three cities of Africa. The livestock keepers were classified either as 'good user' or 'bad user' of manure depending on how they use the manure. The results of this study indicate that the habit of manure utilization shows geographical differences. In general, livestock keepers engaged in agricultural activities are good manure users. Furthermore, manual workers, traders or the self-employed are better manure users than other professional groups. The manure utilization varies also in function of the livestock numbers. In Brazzaville, the habit of selling animals influenced manure management positively. Experience of keeping livestock before the civil war in Brazzaville was also a determining factor of manure use in the post-war urban livestock keeping in 2001. When designing policies to reduce the environmental effects of urban livestock keeping, the highlighted factors can assist city planners to understand how urban livestock keepers use manure. Using the non-parametric classification tree method CART, two approaches were used to select an optimal classification of 'bad' manure users: the 'Cook and Goldman rule' and the 'Classification with different misclassification cost ratios' method. The optimal tree was selected by using receiver operating characteristics curve information. This method can be useful in assessing other aspects of waste management.
    Original languageEnglish
    JournalWaste Management and Research
    Volume28
    Issue number12
    Pages (from-to)1076-1086
    Number of pages11
    ISSN0734-242X
    DOIs
    Publication statusPublished - 2010

    Keywords

    • B780-tropical-medicine
    • Livestock
    • Manure
    • Waste management
    • Hygiene
    • Utilization
    • Agricultural practices
    • Assessment
    • Methodology
    • Determinants
    • Environmental impact
    • Geographical variation
    • Planning
    • Classification
    • Urban
    • Congo-Brazzaville
    • Africa-Central

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