Abstract
Tolerance to soil acidity constraints differ greatly among small grain species. However, information is lacking on the response of durum wheat to acid soil stress. The agribotanical traits of two common (Triticum aestivum L.) and two durum wheat (Triticum durum Desf.) cultivars, grown in limed and unlimed soil in a greenhouse, were measured after 32 weeks. Soil acidity had a greater influence on the agribotanical traits of the durum cultivars. The acid soil stress was severe on spike number, above ground yield and grain yield and less severe on harvest index, plant height and spike length. All cultivars had higher grain yields in limed than unlimed soil, however, the differences were only significant for the durum wheats. The two cultivars of the tetraploid (durum) wheat were more susceptible to soil acidity constraints than the two hexaploid (common) wheat cultivars.
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