In the present study, a considerable build up in soil organic carbon under tree canopy as compared to open canopy was found and soil organic carbon under tree canopy decreased with an increase in soil depth and increasing canopy distance. The total nitrogen percentage in soil decreased with an increase in depth and canopy. In case of available soil phosphorus, it decreased under the tree canopy with increasing soil depth and canopy distance. The value of available soil phosphorus as well as potassium was found higher under the canopy and available potassium in soil was found higher than the open canopy. However, it was found decreasing towards the depth and canopy. The plantation of Acacia nilotica in cropland brought a reduction of soil pH. Therefore a reduction in availability of nutrients under tree canopy was noticed outwards the canopy.

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