Allied & ICAR Exam Bank • ALLIED_0914 NAT • 2 Marks

Section 5: Irrigation and Drainage Engineering

Soil-Water-Plant Relationship

Subtopic: Soil-Water-Plant Relationship

Question Statement:

The osmotic potential of a soil solution is estimated by the empirical relation $\Psi_o = -0.36 \times EC_e\text{ bar}$, where $EC_e$ is in $\text{dS/m}$. For a saline soil saturation extract with $EC_e = 5.0\text{ dS/m}$, the osmotic potential $\Psi_o$ in bar is:

Answer Key:

-1.8

Step-by-Step Solution & Explanation

$\Psi_o = -0.36 \times 5.0 = -1.80\text{ bar}$.
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