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Weed flora of dryland crops in the Córdoba region (Spain)
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Summary:In a study of the weed flora of dryland crops in the Córdoba region (southern Spain) in 1983 and 1984, a total of 256 species from 41 families was identified in the 201 fields surveyed. The families with the highest numbers of species were Compositae, Gramineae, Leguminosae and Cruciferae. Therophytes represented 79% of the biological spectrum, with hemicryptophytes and geophytes more especially in the spring‐sown crops. At the early and late crop growth stages about 4% and 8%, respectively, of the fields had severe or very severe infestations. The seasonality of the crop had a marked influence on the weed flora, mainly due to the relationship of its phenological cycle with well defined climatic periods and to soil management practices. Cluster analysis clearly differentiated typically autumn‐spring and spring‐summer floras as well as a set of common species.
Title: Weed flora of dryland crops in the Córdoba region (Spain)
Description:
Summary:In a study of the weed flora of dryland crops in the Córdoba region (southern Spain) in 1983 and 1984, a total of 256 species from 41 families was identified in the 201 fields surveyed.
The families with the highest numbers of species were Compositae, Gramineae, Leguminosae and Cruciferae.
Therophytes represented 79% of the biological spectrum, with hemicryptophytes and geophytes more especially in the spring‐sown crops.
At the early and late crop growth stages about 4% and 8%, respectively, of the fields had severe or very severe infestations.
The seasonality of the crop had a marked influence on the weed flora, mainly due to the relationship of its phenological cycle with well defined climatic periods and to soil management practices.
Cluster analysis clearly differentiated typically autumn‐spring and spring‐summer floras as well as a set of common species.
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