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PHYTOSOCIOLOGY OF THE VANISHING TROPICAL DECIDUOUS FOREST IN DISTRICT SWABI, PAKISTAN. II-ORDINATION

FARRUKH HUSSAIN, MOINUDDIN AHMED¹, GHAZALA SHAHEEN² AND MUHAKHARA JAN DURRANI²

Abstract: The study deals with the multivariate analysis of the vegetation of Swabi District. Sociological relationships among the leading dominants in tree, shrub and herb layers are discussed separately. Chcmical and physical analysis of soils of each stand are given. The vegetation pattern of each layer of the community and its relationship to soil were examined with the help of polar ordination. Soil pH, CaCO₃ and P₂O₅ were found to be the controlling factors in the distribution of vegetation. The overall vegetation is dominated by Acacia modesta, followed by Ziziphus mauritiana in the tree layer. Asparagus, lmodon, Torilis, Thymelaea, Qxalis and Desmostachya were important in the lower strata.

Department of Botany, University of Peshawar, Peshawar, Pakistan.
Plant Protection (Weed Res), RuaKura Centre, Hamilton, New Zealand.
Department of Botany, University of Balochistan, Quetta, Pakistan.