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Agricultural techniques and water supply in the Sudano-Sahelian zone |
Cahiers Agricultures. Volume 4, Number 1, 29-38, Janvier-Février 1995, Étude originale
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 Résumé
 Summary
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Author(s) : Aliou Ibrahima, André Mermoud, Georges Vachaud, École inter-États d’ingénieurs de l’équipement rural (EIER), 03 BP 7023, Ouagadougou 03, Burkina Faso, Institut d’aménagement des terres et des eaux (IATE), département de génie rural, EPFL, 1015 Lausanne, Suisse, Laboratoire d’étude des transferts en hydrologie et environnement (LTHE/IMG), 38041 Grenoble cedex 9, France.. |
Summary : The effects of level ploughing with clustered ridges on water balance of a sorghum crop were monitored from 1989 to 1991 at the experimental site of Gampela (Burkina Faso), and compared with those of the traditional direct sowing technique. It appeared that the farmer technique increased infiltration by a round 20%. In some cases, this may result in non-negligible percolations at the base of the root profile. Nevertheless, the faster and more complete recharge of the root zone’s water reserve allowed for earlier planting of crops, better rooting, and decreased susceptibility to short dry spells during the growing period. In ail cases, yields from ploughed parcels with clustered ridges were 30% higher than those from traditional parcels, (i.e. direct sowing). The technique’s efficacy could be improved further through the use of organic and mineral fertilisation. |
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