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A soil sample has an Exchangeable sodium percentage (ESP) of 16%, its electrical conductivity is 3.2 Milli-Mohs/cm and a pH of 9.5. How is the soil classified?

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in Irrigation Engineering by (75.2k points)
A soil sample has an Exchangeable sodium percentage (ESP) of 16%, its electrical conductivity is 3.2 Milli-Mohs/cm and a pH of 9.5. How is the soil classified?

(a) Saline soil

(b) Saline-alkaline soil

(c) Alkaline soil

(d) Non-saline soil

The question was posed to me in semester exam.

My question is based upon Reclamation of Saline and Alkaline Lands topic in division Water Logged Reclamation and Saline Soils for Agricultural Purposes of Irrigation Engineering

1 Answer

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by (106k points)
The correct choice is (c) Alkaline soil

Best explanation: The three classes of salty soil are based on these three properties pH range, ESP, and conductivity of saturated extract. Alkali soil has pH range in between 8.5 and 10, ESP greater than 15, and conductivity of saturated extract less than 4 milli-mhos/cm at 25°C.

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