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Soil Indexes
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| Sulphur Index | Lab Range [mg/l] | Comment | | Zero | 0 - 10 | Severe deficiency likely in susceptible crops: Treatment essential | | One | 11 -22 | Deficiency likely in susceptible crops: Treatment Desirable | | Two | 23- 37 | Precautionary Applications considered | | Three | 38 - 51 | Satisfactory Sulphur levels | | Four | 52 - | | Treatment Sulphur can be added to most blended fertilisers and also supplied as a straight. See the related articles for materials containing sulphur. Do NOT mix yellow granular sulphur with Ammonium Nitrate to create a diy nitrogen/sulphur mix. The result could be explosive.
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Technical Support 
