Abstract
The investigation was conducted during the year 2005 – 2006 which was laid out in Factorial Completely Randomized Design with five treatments, viz.; T0 (Open land), T1 (Cultivated land), T2 (Dendrocalamus strictus), T3 (Casuarina equisetifolia) and T4 (Eucalyptus tereticornis) with four replications. The soil samples were collected from three depth (0 – 20, 20 – 40 and 40 – 60 cm). The organic carbon content, available nitrogen, phosphorus, potash, porosity and water holding capacity of soil increased in 0 – 20 cm surface layer as compared to deep layer of the soil i.e. D2 and D3. However, in case of tree species organic carbon content, available nitrogen and phosphorus were highest under Casuarina equisetifolia, whereas potash recorded under Dendrocalamus strictus plantation. Maximum water holding capacity and porosity were found under Eucalyptus tereticornis plantation. Here also degree of improvement goes down with an increase in depth of soil.
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