Question

Which type of the partial flooding of soil surface?

Answer 1

Research in flooded soils has shown that the oxygen concentration approaches zero after 24 hours (however, moderate water movement allows some oxygen to get to the plants, and damage is not as severe.) Without oxygen, the plant cannot perform critical life-sustaining functions such as respiration, water uptake, root growth, etc. Water-logging also leads to accumulations of compounds like CO2, which are toxic to plants in high concentrations.

Under flooded conditions, stomata in affected plants close and may remain closed for long periods, resulting in reduced respiration, transpiration and photosynthesis. Plants may be slow to recover when water recedes. Long-term impacts on the crop are often related to disease infection and retarded root development that limits access to available subsoil moisture later in the season.