Plant Available Water (PAW) is the portion of water in the soil that can be absorbed by plant roots and is crucial for plant growth and survival. It is determined by the difference between field capacity and permanent wilting point, reflecting the soil's ability to retain moisture accessible to plants.

Plant Available Water

Portion of water in the soil

Absorbed by plant roots

Crucial for plant growth

Plants need sunlight, water, air, and nutrients from the soil to grow and stay healthy. They have special parts like roots, stems, and leaves that help them get these things and survive in their environment.

Plant Survival

Field capacity is the amount of soil moisture or water content held in the soil after excess water has drained away and the rate of downward movement has decreased. It represents the balance between water retention for plant use and drainage, crucial for understanding irrigation needs and soil health.

Field Capacity

The Permanent Wilting Point (PWP) is the soil moisture level at which plants can no longer extract water, leading to irreversible wilting and potential plant death. It is a critical threshold in understanding plant-soil-water relationships and is essential for effective irrigation management and agricultural planning.

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