ARCHIVE: Fertiliser Manual (RB209)

Finding the sulphur and sodium recommendations

Sulphur and sodium recommendations are given for each crop where appropriate because they are not required by all crops and in all parts of England and Wales. Farmers are advised to monitor the sulphur requirements of their crops because the risk of sulphur deficiency is increasing as sulphur inputs to agricultural soils decline. Organic manures can supply useful amounts of sulphur (see Section 2).

All sulphur recommendations are given as SO3 and sodium recommendations as Na2O. Conversion tables (metric-imperial, oxide-element) are given in Appendix 8.

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