Which value represents the available water holding capacity (AWHC) for coarse soil per inch of soil?

Study for the TExES Agriculture, Food and Natural Resources 6-12 Test with multiple choice questions and explanations. Prepare for your teaching exam!

Multiple Choice

Which value represents the available water holding capacity (AWHC) for coarse soil per inch of soil?

Explanation:
The value being tested is how much water is available to plants in coarse soil per inch of soil. Available water holding capacity (AWHC) is the difference between field capacity (how much water the soil holds after drainage) and wilting point (the water level at which plants can no longer extract water). For coarse soils like sandy textures, the pores are large and drain quickly, so they hold relatively little water that plants can actually use. That’s why the typical AWHC per inch is about 0.05 inches of water. The other options represent higher water storage more typical of finer textures, where smaller pore spaces hold more water that plants can access.

The value being tested is how much water is available to plants in coarse soil per inch of soil. Available water holding capacity (AWHC) is the difference between field capacity (how much water the soil holds after drainage) and wilting point (the water level at which plants can no longer extract water). For coarse soils like sandy textures, the pores are large and drain quickly, so they hold relatively little water that plants can actually use. That’s why the typical AWHC per inch is about 0.05 inches of water. The other options represent higher water storage more typical of finer textures, where smaller pore spaces hold more water that plants can access.

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