Author(s):

Kavinilavu N and N Pandeeswari

Abstract: Soybean (<em>Glycine max </em>(L.)) is being a two in one crop supplying about 43.3% protein and 19.5% oil is called “Miracle bean”. Legume crops is largely due to their ability to fix atmospheric dinitrogen in a symbiosis with specific bacteria (<em>Rhizobium</em> and <em>Bradyrhizobium</em>). The <em>Rhizobium</em> legume symbiosis is, suggested as an alternative to solving the soil N fertility problem. Soybean performs, nitrogen fixation by establishing a symbiotic relationship with the rhizobia. In this study, the physical chemical properties of soybean soil samples collected from 10 different locations in Dharmapuri district. The soils belonged to textural groups viz., Red loam, Clay loam, Loam and Black soil. Soil organic carbon content ranged from 0.48 to 0.86%; soil pH ranged from 6.55 to 7.75 and EC ranged from 0.10 to 1.45 dsm^-1Soil available nutrients, nitrogen ranged from 66.00 to 135.60 kg ha^-1phosphorus ranged from 8.00 to 18.10 kg ha^-1 from potassium ranged from 118.00 to 190.00 kg ha^-1 respectively. The rhizobial population ranged from 0.62 to7.10 X 10³ CFU g^-1soil. The nodulation pattern and rhizobial populations on the rhizosphere soil of soybean plants were studied. Among the soil samples is analysis the pH, EC, Organic carbon and available major nutrients values are estimated.

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