Diffusion pressure deficit is the amount by which two solutions differ in their (1) T.P(2) O.P(3) D.P(4) W.P

Diffusion Pressure Deficit (DPD) is the proportion by which the diffusion pressure varies between two solutions. This is characterized as the amount by which the water or solvent diffusion pressure in a solution is inferior to that of pure water or solvent. Due to the gradient of diffusion pressure, it enables fast absorption of water. Water is shifting from lower DPD to greater DPD.