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What is the pH range for strongly alkaline soils?

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+1 vote
in Irrigation Engineering by (75.2k points)
What is the pH range for strongly alkaline soils?

(a) 7.4 – 7.8

(b) 7.9 – 8.4

(c) 8.5 – 9.0

(d) > 9

This question was posed to me by my school principal while I was bunking the class.

Asked question is from Salinity and Water-logging topic in section Water Logged Reclamation and Saline Soils for Agricultural Purposes of Irrigation Engineering

1 Answer

0 votes
by (106k points)
The correct option is (c) 8.5 – 9.0

Easy explanation: Very strongly alkaline soils (pH>9) and ultra-acidic soils (pH<3.5) are very rare. The USDA classifies soil pH for alkalinity as follows:

Denomination

pH range

Slightly alkaline

7.4 – 7.8

Moderately alkaline

7.9 – 8.4

Strongly alkaline

8.5 – 9.0

Very strongly alkaline

> 9.0

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