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APPLICATIONS

Choose by crop, then check the rate

Rates below are the ranges we quote most often. Your soil test and local recommendation should always win over a website table.

Crop	Recommended grade	Basal rate	Top-dress	Watch out for
Rice	18-18-18 chloride	250–350 kg/ha	N split, 1–2 doses	Do not drain within 48 h of top-dressing
Corn	18-18-18	250–350 kg/ha	N at V6–V8	Keep fertilizer away from the seed
Banana	17-17-17 water-soluble	0.3–0.5 kg/plant	Every 10–15 days	Biuret-sensitive — use nitrate-based grades
Pineapple	17-17-17 + MKP	0.2–0.4 kg/plant	MKP foliar at 0.2%	Chloride sensitivity at establishment
Vegetables	15-15-15 sulphate	450–750 kg/ha	15-15-15 or high-N	Sulphate at transplanting
Chilli / solanaceous	15-15-15 sulphate	500–750 kg/ha	High-K at fruit set	Do not push nitrogen during fruit set
Sugarcane	18-18-18 chloride	400–600 kg/ha	High-K at earthing up	Ratoon crops need the split earlier
Oil palm	High-K (25-10-16 type)	2–4 kg/tree/year	Split over 2–3 rounds	Long-term K balance matters more than P
Potato	15-15-15 sulphate	500–800 kg/ha	High-K at tuber bulking	Chloride reduces starch — sulphate only
Citrus / fruit trees	18-18-18 sulphate + MKP	0.5–1.5 kg/tree	MKP at sizing	Chloride accumulation in leaves

Convert kg/ha to kg/acre by dividing by 2.47. Local registration and recommended rates vary by country; ask us and we will quote against your market's guidance.

CROP NOTES

The six crops we are asked about most

Rice

Grade18-18-18 chloride
Basal250–350 kg/ha, into puddled soil
Tillering18-18-18 or urea, 100–150 kg/ha
PanicleUrea or high-N, 80–120 kg/ha
WaterKeep 3–5 cm for 48 h after top-dressing

Detailed rice guide →

Corn

Grade18-18-18
Basal250–350 kg/ha at planting
Top-dressN at V6–V8
Placement5 cm to the side, below seed depth
Yunnan trial+12.8% vs imported brand

Grade specification →

Banana

Grade17-17-17 water-soluble, nitrate-based
Rate0.3–0.5 kg per plant per round
TimingFlower differentiation to bunch emergence
MethodFertigation or ring trench
Why nitrateZero biuret — no root damage

Why biuret matters here →

Pineapple

Grade17-17-17 + MKP foliar
Base0.2–0.4 kg per plant, split
FoliarMKP 0.2%, at fruit sizing
WatchChloride sensitivity at establishment
AerialUse flying-grade MKP

MKP spray guide →

Vegetables

Grade15-15-15 sulphate at establishment
Basal450–750 kg/ha
Top-dressHigh-N during vegetative growth
Fruit stageSwitch to high-K or MKP
TrialsLeafy +13.75%, chilli +18.75%

Grade specification →

Oil palm

GradeHigh-K, 25-10-16 type
Rate2–4 kg per tree per year
SplitTwo to three rounds
FocusPotassium balance over the cycle
AlsoBoron and magnesium are often limiting

Ask for a formula →

NOT SURE WHICH GRADE

Two questions decide most of it

QUESTION 1

Is the crop chloride-sensitive?

Tobacco, potato, grape, citrus, cucurbits and most vegetables: use sulphate. Rice, corn, sugarcane and oil palm accept chloride grades.

Read the crop table →

QUESTION 2

How are you applying it?

Broadcast or band: 18-18-18 or 15-15-15. Drip or fertigation: 17-17-17 water-soluble. Foliar at fruit set: MKP.

Compare the four lines →

STILL UNSURE

Send the soil test

One page of soil data and the target yield is enough for us to recommend a grade and a rate, in writing.

Send your details →

Tell us the crop and the country

We will send the grade, the rate and the local registration requirements we know of.

Ask for a recommendation