What is the goal for a water manager regarding the soil moisture reservoir?

• A. To keep soil moisture at full capacity
• B. To maintain soil moisture below field capacity, but above permanent wilting point
• C. To minimize soil moisture loss
• D. To maximize soil humidity

Answer: (B)

Maintaining soil moisture below field capacity but above the permanent wilting point is a key practice in effective water management, especially in landscape management. The goal is to ensure that the soil retains adequate moisture for plant health while avoiding waterlogging, which can lead to root rot and other issues resulting from excessive water saturation.

Field capacity represents the point at which soil retains the maximum amount of water without saturating, meaning that there is still air space available for root respiration. By keeping moisture levels below this point, a water manager ensures that oxygen can reach plant roots, which is crucial for their growth and nutrient uptake.

On the other hand, maintaining moisture above the permanent wilting point means sustaining enough water in the soil to prevent plants from wilting. When soil moisture falls below this threshold, plants cannot extract sufficient water, leading to stress and possible death.

Thus, this approach balances the needs of the plants with efficient water use, making it an essential strategy for water managers focused on sustainable landscape practices.