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What is the soil water called that is held in extremely fine pores with such high tension that plants cannot extract it?

Answer and explanation

Correct answer: Hygroscopic water

Correct answer: B, hygroscopic water. Soil particles, especially their very fine surfaces, attract water molecules and hold them as a thin, tightly attached film. The binding tension is so high that ordinary root absorption cannot remove this water; it is therefore considered unavailable to plants. A gravitational water drains downward through larger soil spaces under gravity and may be available only briefly. C capillary water is retained in smaller pores by capillary forces and is generally the important available-water supply for plants. D free groundwater is mobile water below the ground surface, not a tightly bound film around soil particles. Cue: hygroscopic water hugs soil particles too tightly for roots to use.

Related tags

Hygroscopic-WaterSoil-WaterPlant-Available-WaterHydrological CycleThe Living WorldBiologyClass 11 Mcq

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