Prof . Purohits study on large cardamum and mandarin based agroforestry systems in Sikkim revealed : ( 1 ) acceleration of nutrient cycling under the influence of N2 fixing trees, ( 2 ) greater release of nutrients from non-N2-fixer letter and ( 3 ) solubilisation of secondarily fixed phosphorus by Alnus and Albizia.
मोबाइल