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The Servarayan hill range (11 0 48'N & 78 0 11'E) located near Yercad of Salem district in Tamil Nadu rise to an altitude ranging from 1200-1500m. The maximum temperature ranges between 25 0 C and 30 0 C and minimum between 13 0 C and 16 0 C. The average annual rainfall is around 1750mm. The soil is deep and non-calcareous. The topmost hill area is characterised by clay loamy soil whereas the bottom of the valley is distinguished by alluvial and clay loam soil. The forest types range from evergreen to moist deciduous On the western side of the hills, contrast sholas still exist, though a great portion of the plateau is cleared.
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Udayan et al. (2006) studied this question.
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