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Bulletin of the National Research Centre

Table 2 Rating for chemical vulnerability

From: Assessment of land degradation and implications on agricultural land in Qalyubia Governorate, Egypt

Factor

Index

Class

Low

Moderate

High

Very high

Climate

PET/(P + Q)10

< 0.1

0.1–0.3

0.3–0.5

> 0.5

Soil

Texture class

Clay

Silt

Sand

–

Topography

Slope %

0–2

2–8

> 8

–

  1. Adapted after FAO (1978). PET potential evapo-transpiration, p precipitation/year, Q irrigation water
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