Question

Which plant is used for indication of permanent wilting point?

Answer 1

The permanent wilting point is the water content of a soil when most plants (corn, wheat, sunflowers) growing in that soil wilt and fail to recover their turgor upon rewetting. The matric potential at this soil moisture condition is commonly estimated at -15 bar.

Answer 2

Permanent Wilting point  the content soil and water for some plants like wheat, sunflowers, corn to growing recover upon regretting point. It was soil moisture which was commonly estimated for agriculture plants with signs of wilting before.

The volumetric soil dampness content at the shriveling point will have dropped to around 5 to 10% for sandy soils, 10 to 15% in topsoil soils, and 15 to 20% in mud soils.