National highway induced selected chemical properties of soils across tea bowl of India: scale and assessment

National Highway may have damaging effect on soil chemical properties. In this study, a scale and assessment of selected chemical properties of tea growing soils with increasing sampling distance from National Highway have been documented. Top and sub soils from ten tea estates surrounding the National Highway of Dibrugrah and Tinsukia districts at the Upper Brahmaputra plain of India were analysed to understand the variation of the selected chemical properties influenced by National Highway. Significantly lower ( p