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Which outcome limits water infiltration in stepped terraces of ancient wadi farms?

A)Calcareous layer accumulation forms hardpan
B)Clay content optimizes capillary action
C)Coarse sand increases overall permeability
D)Organic mulch enhances soil absorption

💡 Explanation

Caliche accumulation reduces water infiltration via the **precipitation-dissolution process**, wherein dissolved calcium precipitates clog pores. Because the hardpan layer reduces permeability, water cannot flow through effectively, therefore hindering root water access; enhanced absorption requires water flow through soil, rather than impeded.

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