Explain the direct and indirect effects of lime application

The direct and indirect effects of lime application to acid soils generally are increased crop growth, although their magnitude varies widely under different soil conditions and cropping systems. Legumes are more responsive to lime application in acid soils.  In some tracts, rice responds to liming.  Application of lime in combination with NPK fertilizers increases the yields of wheat, maize, jowar and jute. The main reason for differential response to lime is that soil reaction references of different crops for normal growth are not identical.