A Study of the Effect of Pyrites and Rhizobium Inoculation on Chlorophyll and Sugar Content in Black Gram under Sodicity Stress Condition

Calcareous soils have resulted in precipitation of CaCO3 from water of some rivers which contain high amount of CaH(CO3)2. The tropical aridity creates reaction resulting in accumulation of salts. Most of the waterof uplands is lost due to runoff and transpiration reducing effective leaching. Precipitation of calcium increases sodium concentration which is further augmented by high RSC of the available water resources. Salinity is the major yield reducing factor in legume cultivation as legumes are salt sensitive crop, especially in the seedling stages where they are most susceptible to damage due to water stress and ion-imbalance.

In saline soils, many environmental factors such as soil pH, water deficiency and nutrient deficiency are reported in Ref.that the seedling stage suffers most damage due to ion-imbalance and thus, other physiological processes are negatively affected during the growth of theplant especially photosynthesis. Ref.reported that during long term exposure to salinity, plants experience premature senescence of adult leaves and root nodules which reduce the net photosynthetic area available to support continued growth of the plant. Thus, bio-synthesis of sugar and nitrogen fixation are negatively affected.