Campbell-scientific Sentek TriSCAN® Manual v 1.2a Manual de usuario descargar pdf (Pagina 49)

TriSCAN Manual Version 1.2a

Appendix 2: Guidelines for Interpretation of Water

Salinity for Irrigation

Table 7. Guidelines for Interpretations of Water Salinity for Irrigation (from Ayars & Westcott)

Salinity measure Units Degree of Restriction on Use

None Slight to

Moderate

Severe

dSm

-1

< 0.7 0.7 – 3.0 > 3.0

TDS mgL

-1

< 450 450 -2000 > 2000

means electrical conductivity of the water salinity, reported in deciSiemens per meter at 25°C (dSm

-1

)

or in units millimhos per centimetre (mmho/cm). Both are equivalent. TDS means total dissolved solids,

reported in milligrams per litre (mgL

-1

All plants do not respond to salinity in a similar manner; some crops can produce acceptable yields at much

greater soil salinity than others. This is because some are better able to make the needed osmotic

adjustments enabling them to extract more water from a saline soil.

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Campbell-scientific Sentek TriSCAN® Manual v 1.2a Manual de usuario Pagina 49