Incitec Pivot Fertilisers · Nitrogen + Sulphur · granular
Gran-Am (ammonium sulphate)
Gran-Am (ammonium sulphate) is a granular nitrogen + sulphur fertiliser from Incitec Pivot Fertilisers. Its published analysis (N-P-K-S) is 20.2-0-0-24, supplying nitrogen 20.2%, sulphur 24%. We hold no verified price for it.
% nitrogen – phosphorus – potassium (N–P–K)
20.2–0–0
Last checked 2026-10-17 · How we check · Report an error
At a glance
| Brand | Incitec Pivot Fertilisers |
|---|---|
| Type | Nitrogen + Sulphur |
| Form | granular |
| We list it under | Paddock crops |
| Organic-certified | Not stated |
| Pack sizes | Not verified |
| Safety data sheet | Not linked yet; ask the supplier |
| Nitrogen (N) | 20.2% |
| Phosphorus (P) | 0% |
| Potassium (K) | 0% |
| Sulphur (S) | 24% |
“—” means not published or not verified. Not published or not verified: Calcium (Ca), Magnesium (Mg), Zinc (Zn), Copper (Cu), Boron (B). Analysis as published by the manufacturer; always read the current label.
Composition
- N20.2%
- P0%
- K0%
- S24%
Who it may suit
- Where sulphur is needed as well: it supplies 24% S.
- We list it under paddock crops.
- Crop-by-crop suitability is not something we have verified for this product. Use your soil test and agronomist, or Find my fertiliser for soil and pH-based nitrogen options.
Application calculator
How much of this product delivers a given amount of nitrogen, and what that costs. Working out the target? See the nitrogen rate calculator. The starting value is an example, not a recommendation.
Nitrogen loss to the air: ammonium sulphate
In a northern NSW study, ammonium sulphate lost less than half as much N as urea on non-calcareous soils, but 19–34% on fallow soils with more than 10% calcium carbonate, which is higher than urea.
Source: GRDC 2021
The manufacturer advises against swapping urea for ammonium sulphate where soil has free lime (more than 2% CaCO3).
Source: Incitec Pivot Fertilisers (manufacturer; commercial interest in Green Urea NV) 2024 (manufacturer)
A 1994 WA bulletin describes sulphate of ammonia as strongly acidifying.
Source: DPIRD Digital Library 1994
What this does not show: Sulphur supply is a separate benefit. We have not published sulphur-need thresholds for crops from a primary source.
See these ranges applied to your soil and pH in the comparison tool.
Where to buy Gran-Am (ammonium sulphate)
Manufacturer
Incitec Pivot Foundational Nitrogen (Urea and GranAm) (opens in a new tab)
Manufacturer page for this product. Verified on 17 Oct 2026.
Retailer
Nutrien Ag Solutions: bulk fertiliser range (granulated sulphate of ammonia) (opens in a new tab)
Generic retailer page only: it names the commodity (for example urea), not this brand. Ask which brand they supply. Verified on 17 Oct 2026.
Retailer
Farm Tender Farm Inputs: SOA (ammonium sulphate) ex Geelong (opens in a new tab)
Generic retailer page only: it names the commodity (for example urea), not this brand. Ask which brand they supply. Verified on 17 Oct 2026.
Stockist locator
Incitec Pivot Fertilisers: find an IPF location (opens in a new tab)
Find a stockist: ask which distributor carries it. Verified on 17 Oct 2026.
Stockist locator
Incitec Pivot Fertilisers: product range by site (opens in a new tab)
Find a stockist: ask which distributor carries it. Verified on 17 Oct 2026.
Stock and prices not checked. Confirm with the supplier.
Links were opened and read on 17 Oct 2026 to confirm the page loads and names the product or brand. None are affiliate links.
Find a stockist near you
- Nutrien Ag Solutions: find a branch (opens in a new tab)
- Elders: our branches (opens in a new tab)
- Incitec Pivot Fertilisers: find a location (opens in a new tab)
You search by your own postcode or town on their site. We don't collect your location.
Similar products
27–0–0
% nitrogen – phosphorus – potassium
- Form
- Granular
- Type
- Nitrogen + Calcium
- Sulphur
- —
- Indicative cost
- No verified price
Checked 2026-10-17
Where to buy (3)
Retailer
Nutrien Horticulture: Cal-Am (opens in a new tab)
Retailer page that names this product. Verified on 17 Oct 2026.
Stockist locator
Incitec Pivot Fertilisers: find an IPF location (opens in a new tab)
Find a stockist: ask which distributor carries it. Verified on 17 Oct 2026.
Stockist locator
Incitec Pivot Fertilisers: product range by site (opens in a new tab)
Find a stockist: ask which distributor carries it. Verified on 17 Oct 2026.
Stock and prices not checked. Confirm with the supplier.
Links were opened and read on 17 Oct 2026 to confirm the page loads and names the product or brand. None are affiliate links.
Find a stockist near you
- Nutrien Ag Solutions: find a branch (opens in a new tab)
- Elders: our branches (opens in a new tab)
- Incitec Pivot Fertilisers: find a location (opens in a new tab)
You search by your own postcode or town on their site. We don't collect your location.
15–14–0
% nitrogen – phosphorus – potassium
- Form
- Granular
- Type
- NPS compound
- Sulphur
- 10.4%
- Indicative cost
- No verified price
Checked 2026-10-17
Where to buy (3)
Manufacturer
Summit Fertilizers: cropping range (CropStar) (opens in a new tab)
Manufacturer page for this product. Verified on 17 Oct 2026.
Stockist locator
Summit Fertilizers: agents (mostly WA rural suppliers) (opens in a new tab)
Find a stockist: ask which distributor carries it. Verified on 17 Oct 2026.
Stockist locator
Summit Fertilizers: depots (opens in a new tab)
Find a stockist: ask which distributor carries it. Verified on 17 Oct 2026.
Stock and prices not checked. Confirm with the supplier.
Links were opened and read on 17 Oct 2026 to confirm the page loads and names the product or brand. None are affiliate links.
Find a stockist near you
- Nutrien Ag Solutions: find a branch (opens in a new tab)
- Elders: our branches (opens in a new tab)
- Incitec Pivot Fertilisers: find a location (opens in a new tab)
You search by your own postcode or town on their site. We don't collect your location.
10–17.5–0
% nitrogen – phosphorus – potassium
Analysis unverified: source link retired.
- Form
- Granular
- Type
- NPS compound
- Sulphur
- 12%
- Indicative cost
- No verified price
Checked 2026-10-17
Where to buy (3)
Manufacturer
Granulock SS product page (opens in a new tab)
Manufacturer page for this product. Verified on 17 Oct 2026.
Stockist locator
Incitec Pivot Fertilisers: find an IPF location (opens in a new tab)
Find a stockist: ask which distributor carries it. Verified on 17 Oct 2026.
Stockist locator
Incitec Pivot Fertilisers: product range by site (opens in a new tab)
Find a stockist: ask which distributor carries it. Verified on 17 Oct 2026.
Stock and prices not checked. Confirm with the supplier.
Links were opened and read on 17 Oct 2026 to confirm the page loads and names the product or brand. None are affiliate links.
Find a stockist near you
- Nutrien Ag Solutions: find a branch (opens in a new tab)
- Elders: our branches (opens in a new tab)
- Incitec Pivot Fertilisers: find a location (opens in a new tab)
You search by your own postcode or town on their site. We don't collect your location.
Related guides
Sources and last updated
- Analysis: https://www.incitecpivotfertilisers.com.au/products/foundational-fertilisers/incitec-pivot-foundational/nitrogen/ (checked 2026-10-17). Manufacturer product page; page text read 17 Oct 2026 shows this analysis.
- Nitrogen loss pathways. How much N is lost when urea is not mechanically incorporated after application? (GRDC 2021)
- Planning nitrogen applications and rethinking potential urea nitrogen volatilisation losses (Incitec Pivot Fertilisers (manufacturer; commercial interest in Green Urea NV) 2024 (manufacturer))
- Bulletin 4283 – Nitrogen fertilisers for cereal production (DPIRD Digital Library 1994)
- Machine-readable: JSON.
Page last updated 2026-10-17. Data policy: unknown values are shown as “—”, never guessed. Recommendations on this site are sponsor-blind; see methodology.
General information only. Check with your agronomist or local advisor. More