The distribution pattern of soil microflora was studied in a five year old rubber plantation in Tripura by placing fertilizers at varying soil depths. The fungal, bacterial and mycorrhizal population were found to decrease significantly in deeper soil layers. Horizontal distribution of bacteria showed maximum activity in the region of higher root concentration. The mycorrhizal infection was found higher towards the base of the trees and also away from the site of fertilizer placement.
Arbuscular mycorrhizae, Fertilizer, Hevea brasiliensis, Soil microflora