Science et changements planétaires / Sécheresse


Cereals in dry farming and annual rainfall: the case of North Algeria Volume 20, issue 2, avril-mai-juin 2009


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Laboratoire de bioclimatologie Inra Baraki Alger Algérie, Université de Blida BP 30A Ouled Yaich Blida Algérie

Since 1970 the cereal production in Algeria has no longer met the population’s needs. Practiced extensively and under a rainy conditions, cereal farming occupies an area estimated at 3 million hectares. It produces only a quarter of today’s needs, estimated to be 80 million quintals. The relatively low level of productivity, with 7 quintals/hectare in average, is attributed mainly to the deficit in rainfall. However, the diagnosis made when analysing temporal variability of productivity shows a slight increase when rain decreases. To overcome the cereal production deficit, it is imperative to quadruple production, either by increasing the cereal area from 3 to 11.5 million hectares, or by increasing the yield to 27.5 quintals per hectare. This partial diagnosis devoted to the temporal evolution of production and which shows the level of dependence on foreign cereal, should be completed by a spatial analysis in order to determine the potential cereal zones and the causes of unproductiveness.