Infiltration
Infiltration is the entry of water through the soil surface. It differs from drainage, which includes movement through and out of the root zone after water enters. For a mango, slow infiltration can cause runoff while fast infiltration may still lead to saturation above an underground barrier. Check both surface behavior and moisture at root depth when planning irrigation. A puddle's disappearance alone does not prove that the whole planting site is adequately drained.