Soil salinity classes and crop growth

Soil salinity classes and crop growth

    Sl. No

    Soil salinity class

    EC(e).dSm-1

    Effect on crop growth

    1.

    Non saline

    <2

    Salinity effects negligible

    2.

    Slightly saline

    2- 4

    Yields of sensitive crops may be restricted.

    3.

    Moderately saline

    4 - 8

    Yield of many crops restricted.

    4.

    Strongly saline

    8 - 16

    Only tolerant crops yield satisfactory.

    5.

    Very strongly saline

    >16

    Only a few very tolerant crops yield is satisfactory.

    Equations for relating EC with OP and TDS Conversions
      Total cations (m eq/L)=10 X EC(dS/m) at 25oC
      Salt Concentration(mg/L)= 640 X EC(dS/m) at 25oC
      Osmotic Pressure= 0.36 X EC (dS/m) at 25oC
      % Salt in solution= 0.064 X EC (dS/m) at 25oC X Saturation percentage(SP)                                                                                               
                                                                                                            100   
Last modified: Saturday, 3 December 2011, 5:50 AM