Why Choose Ammonium Nitrate Sulphate for Crops?

Ammonium Nitrate Sulphate can supply crops with nitrogen and sulphur in one granular fertilizer. Its nitrogen is present in ammonium and nitrate forms, while sulphur is generally supplied as sulphate. That combination can be useful where soil tests or crop history indicate a need for both nutrients. But it is not automatically the best choice for every field.

Dr. Achim Dobermann, a soil fertility and crop nutrition specialist, has emphasized matching nutrient management to crop needs and local conditions. A concise paraphrase of that principle is: “Choose nutrients according to crop demand, soil supply, and timing.” This is a paraphrase, not a verbatim quotation. The practical point matters: a grower should check soil results, expected yield, and the field’s sulphur status before choosing a product.

Look closely at the label. Product analysis can vary, and the amount applied should reflect its stated nutrient content. Consider the crop’s growth stage, too. A well-timed application may support healthy leaves and protein formation; an unsuitable rate can waste nutrients or harm crop performance. Weather and soil texture also matter. Heavy rain can move nitrate below the root zone, while dry conditions may limit nutrient uptake.

No fertilizer is a shortcut. Ammonium Nitrate Sulphate is best considered as one option within a measured nutrient plan, not a universal solution. Local agronomic advice can help translate test results into an appropriate rate and application schedule. Practical details deserve attention. So do uncertainties: field conditions change, and recommendations should be reviewed rather than copied blindly.

Ammonium Nitrate Sulphate: Composition of the Common 26-0-0-13S Grade

The 26-0-0-13S grade supplies 26% total nitrogen and 13% sulfur by weight. The zeros mean it contains no guaranteed phosphate or potash. In a 50-kilogram bag, that equals 13 kilograms of nitrogen and 6.5 kilograms of sulfur. Check the product label for the exact nutrient analysis.

Ammonium nitrate sulphate is commonly made from ammonium nitrate and ammonium sulfate. Its nitrogen may be present in both ammonium and nitrate forms, but their proportions can vary by formulation. Sulfur is commonly supplied as sulfate, which crops can take up through their roots. That balance matters. Nitrogen supports leafy growth and protein formation, while sulfur contributes to amino acids and enzyme activity.

This grade can suit crops with meaningful nitrogen and sulfur needs, especially where soil tests show low sulfur. It does not replace phosphorus or potassium when those nutrients are required. A pale patch between leaf veins can suggest a nutrient issue, but it is not a diagnosis; several stresses look similar. Use soil or plant tests, consider crop stage, and follow the local application guidance. More fertilizer is not automatically better, and timing can still be imperfect.

Nitrate and Ammonium Nitrogen: Two Forms in a 26% N Fertilizer

Sulphur’s Role in Crop Nutrition and the Value of a 13% S Grade

Choosing Crops and Application Rates Through Soil Testing and Yield Targets

Ammonium nitrate sulphate supplies nitrogen and sulphur, nutrients that support crop growth and protein formation. It may suit cereals, oilseed crops, and other crops where soil tests or crop history indicate a need for both nutrients. But crop choice alone is not enough. A soil test gives a clearer starting point. Take representative samples across similar soil areas, rather than relying on one sample from a headland or unusually wet patch. Check the laboratory’s results alongside previous yields, crop residues, and manure applications. Small details matter.

Set application rates against a realistic yield target, not an optimistic guess. Estimate the crop’s nitrogen requirement, then account for nitrogen already available from soil, manure, and previous crops. Use the product’s nutrient analysis to calculate how much fertiliser supplies the remaining need; follow local agronomic guidance where available. Sulphur rates should also reflect the test result and crop demand. Oilseed crops may need careful sulphur planning, while legumes often require a different nitrogen strategy. Timing matters. Splitting nitrogen applications can help match supply to uptake, especially where heavy rain could move nutrients below the root zone. Field records are rarely perfect, and that is worth admitting: compare treated areas, rainfall, and harvested yield each season, then adjust the next plan.

Storage, Handling, and Local Rules for Nitrogen-Sulphur Fertilizers