Altitudinal gradient drives significant changes in soil physico-chemical and eco-physiological properties of Rhododendron anthopogon: a case study from Himalaya oleh Zahid Ahmed Mangral, Shahid Ul Islam, Lubna Tariq, Sharanjeet Kaur, Rameez Ahmad, Akhtar H. Malik, Shailendra Goel, Ratul Baishya, Saroj Kanta Barik, Tanvir Ul Hassan Dar