Good sugarcane nutrition starts with a simple question: what does this field need at this crop stage? Feeding by habit can leave one nutrient short while another accumulates. A useful sugarcane fertilizer schedule combines soil testing, split applications, reliable irrigation and regular leaf inspection.
Before using any dosage
The numerical schedule below is a Gujarat plant-cane example from Navsari Agricultural University (NAU). Your state, soil test, variety, planting season, irrigation system and yield target may require different quantities. Ratoon cane needs a separate plan. Use the current recommendation from your local KVK, agricultural university or sugar mill agronomist. [1] [2]
1. Stage-wise growth: what sugarcane needs and when
Use crop development as well as days after planting (DAP). The following approximate windows follow NAU’s growth-stage description; cool weather, longer-duration planting seasons and local varieties can shift them. [3]
01 · Establishment
Planting to about 60 days
Buds sprout and roots establish. Look for even emergence and gaps in rows. Support the crop with sound seed material, suitable basal nutrition, moist soil and drainage.
02 · Tillering
About 60–130 days
Shoots multiply around the base. Protect the developing stand with the planned nutrient splits, weed control and steady moisture. Count productive-looking tillers rather than judging leaf colour alone.
03 · Grand growth
About 130–250 days
Stalks elongate and the canopy expands. Maintain balanced nutrition and irrigation, finish locally scheduled top-dressing and earthing up, and investigate uneven patches promptly.
04 · Maturity
About 250–360 days or later
Sugar accumulation becomes the priority. Avoid unplanned late nitrogen. Assess harvest readiness using the variety, planting date and mill or agronomist maturity checks.
At 150 days, a typical annual cane crop is still in active growth. A micronutrient product should not be described as a universal ripening treatment at that age. Longer-duration crops need a different calendar.
2. How to identify nutrient deficiency in sugarcane
Start with which leaves are affected, then examine the pattern. Compare several affected clumps with nearby healthy plants. A deficiency can resemble drought, waterlogging, salinity, root damage, herbicide injury or disease; confirm the cause before choosing a correction.
Look at older leaves
General paling can suggest nitrogen shortage; scorched edges can suggest potassium shortage. Magnesium problems may produce mottling or rusty spots. These are clues to investigate.
Look at younger leaves
Pale stripes between veins can suggest iron or zinc problems. More uniform paling of new growth can suggest sulphur shortage. Distorted emerging leaves need closer investigation.
| Possible shortage | Visible clues | What to check next |
|---|---|---|
| Nitrogen (N) | General pale green to yellow foliage; older leaves may dry early; weak stalk growth. | Check the nitrogen budget and root-zone moisture before revising a planned N split. [4] |
| Phosphorus (P) | Poor tillering, weak roots, shorter narrow leaves; blue-green or reddish-purple colouring may occur. | Review soil-test phosphorus, soil conditions and placement of the basal fertilizer. [5] |
| Potassium (K) | Older leaves develop yellow-orange colouring and dry margins; stalks may remain thin. | Check soil potassium and salinity or drought that can also scorch leaf edges. [6] |
| Iron (Fe) | Young leaves show pale stripes between veins; severe cases can become almost white. | Check soil pH and drainage; confirm iron shortage before selecting an appropriate correction. [7] |
| Zinc (Zn) | Younger leaves become pale or yellow between greener veins; tissue may dry in severe cases. | Confirm zinc status. Match the correction to the zinc formulation and its approved label. [8] |
| Sulphur (S) | Newer leaves are especially pale; the whole plant may resemble nitrogen-deficient cane. | Check sulphur already supplied by SSP, ammonium sulphate or other sulphate fertilizers. [9] |
| Magnesium (Mg) | Paling with small spots; rusty or freckled spotting can be pronounced on older leaves. | Confirm Mg status and review potassium–magnesium balance before adding more nutrients. [10] [15] |
| Boron (B) | Small or malformed leaves and abnormal emerging growth. | Confirm with a test or local diagnosis; measure any boron correction carefully. [11] |
A practical field check
- Record crop age, affected leaf position, recent fertilizer applications and irrigation history.
- Inspect roots and drainage, and check the undersides of leaves for insects or damage.
- Ask the laboratory or local adviser which leaf and soil sampling method to use; keep healthy and affected areas separate.
- Recheck new growth after an approved correction. Damaged old tissue may remain marked even when the cause has been addressed.
3. Sugarcane fertilizer schedule: a Gujarat plant-cane example
NAU’s example uses a seasonal target of 250 kg N + 125 kg P₂O₅ + 125 kg K₂O per hectare, approximately 101 + 51 + 51 kg of nutrients per acre. The schedule below follows the SSP route in its plant-cane fertilizer table. [1]
Know the fertilizer grades
This calculation assumes urea 46% N, single superphosphate (SSP) 16% P₂O₅ and muriate of potash (MOP) 60% K₂O. The table lists the weight of fertilizer product. P₂O₅ and K₂O are the conventional fertilizer label units for phosphorus and potassium.
| Application time | Urea kg/acre (kg/ha) | SSP kg/acre (kg/ha) | MOP kg/acre (kg/ha) |
|---|---|---|---|
| At planting | 33 (82) | 158 (391) | 42 (104) |
| 1½–2 months about 45–60 DAP | 66 (163) | — | — |
| 3½ months about 105 DAP | 44 (109) | — | — |
| 4½–5 months about 135–150 DAP | 77 (190) | 158 (391) | 42 (104) |
| Season total | 220 (544) | 316 (782) | 84 (208) |
Before planting, include well-decomposed organic manure where locally recommended. Count nutrients from FYM, pressmud, compost and earlier fertilizers when your adviser adjusts the mineral-fertilizer budget. Soil-test-based rates can differ substantially from the example. [2]
Substitute by nutrient content
Changing SSP to DAP also adds nitrogen, so the urea quantity must be recalculated. Changing MOP to potassium sulphate or potassium nitrate changes the product weight and accompanying nutrients. Do not add a second complete NPK schedule on top of this one.
For example, 10 kg of NPK 19:19:19 supplies 1.9 kg each of N, P₂O₅ and K₂O. Record those contributions in the same seasonal budget. A soil-fertilizer schedule also needs redesigning for drip fertigation using suitable soluble products, irrigation-water data and smaller planned applications.
4. Micronutrients: when to inspect, when to spray
Micronutrients complement the main fertilizer programme. Inspect the crop during establishment and tillering, review it again during rapid stalk growth, and treat a confirmed shortage with a suitable labelled product. A calendar reminder is a useful inspection point; it does not automatically mean another spray is needed.
| Review point | What to assess | Fertilizer decision |
|---|---|---|
| 45–60 DAP | Early stand, shoot vigour and leaf colour | Apply a micronutrient product only where a diagnosis, approved label or local programme supports it. |
| 90–120 DAP | Pale stripes, new growth and response to earlier inputs | Review the cause and previous treatment before repeating a spray. |
| 150 DAP onward | Canopy condition, moisture and any persistent problem | Use a targeted correction if needed; assess maturity separately using the local crop calendar. |
How much goes into a 15-litre pump?
For GACIL Sugarcane Special and other liquid inputs, take the dilution from the current approved pack label. The Sugarcane Special description does not state a numerical ml/L rate, so a product-specific dilution is not assigned here. A pump capacity of 15 litres makes the conversion clear:
Product per 15-litre tank = label dose per litre × 15
If an approved label states 2 ml/L, the arithmetic is 30 ml for 15 L of final spray mixture. This is a calculation example, not a recommended GACIL dilution. The spray volume used per acre must also follow the label and sprayer calibration.
For a confirmed magnesium deficiency, TNAU lists magnesium sulphate at 2% as a foliar correction, twice at a fortnight’s interval. At 2% weight/volume, that is 20 g/L, or 300 g made up to 15 L of final solution. Use this only with a suitable foliar-grade product and local advice; follow any stricter product-label direction. [10]
Zinc sulphate products sold as 21% and 33% Zn have different nutrient strengths. Match any university or label rate to the exact formulation. Iron, boron and multi-micronutrient liquids also need their own directions; one common spray dose does not fit them all.
Where humic, seaweed and liquid micronutrients fit
Consider GACIL Potassium Humate (Humic Acid) for a labelled root-zone support programme, GACIL Seaweed Liquid as an optional growth-support input, and GACIL Multi Micronutrient Liquid when its declared nutrients match an assessed shortage. Humic and seaweed research in sugarcane supports evaluating these inputs, but responses depend on the formulation and field conditions. Research doses cannot be transferred directly to a different commercial product. [16] [17]
| Crop situation | GACIL option to consider | How to use it in the plan |
|---|---|---|
| Establishment and active tillering | Potassium Humate (Humic Acid) | Consider a label-approved soil or root-zone application as part of the early crop programme. Retain the planned NPK, organic matter and irrigation management. |
| Active growth or recovery after a short stress period | Seaweed Liquid | Use only at the product’s labelled crop stage, dilution and repeat interval. Restore adequate moisture and address the stress cause first. |
| Confirmed trace-element need during tillering or grand growth | Multi Micronutrient Liquid | Compare the formulation with the identified need. Use its labelled dilution, method and maximum area rate, with calibrated spray volume. |
Choose a micronutrient programme deliberately
Sugarcane Special and a general liquid micronutrient mixture can supply overlapping trace elements. Compare both labels and select the suitable option with your adviser. Avoid applying both at full rates as a routine addition. Do not assume humic, seaweed and micronutrients can share one spray tank; check each label’s compatibility instructions.
5. Apply fertilizer where the crop can use it
- Soil application: place fertilizer in the recommended band beside the cane row, cover it with soil and coordinate irrigation with soil moisture and rainfall. ICAR–CCARI describes top-dressing 8–10 cm from rows and 6–8 cm deep for its local conditions. [12]
- Foliar application: use clean water, accurate measuring equipment and a calibrated sprayer. Follow the product’s crop, dilution, repeat interval and weather directions; first check a small area if advised.
- Tank mixing: check the approved compatibility directions for every input. Keep calcium fertilizers separate from concentrated phosphate or sulphate solutions unless a validated mixing plan allows them.
- Growth monitoring: keep a record of dates, products, quantities and the crop’s response. Investigate drainage, pests and root problems when fertilizer alone does not explain poor growth.
Ratoon sugarcane needs its own plan
Ratoon cane regrows from the stubble after harvest, so its starting condition differs from planted setts. Assess the stand, gaps, stubble health, irrigation and soil results immediately after harvest. Ask for a ratoon-specific nutrient schedule rather than copying the plant-cane table. Regional guidance may change both nitrogen quantities and the timing of early applications. [14]
During maturity, use the locally recommended end point for nitrogen applications and assess cane quality with your mill or adviser. A refractometer can help assess maturity; crop age alone cannot establish harvest readiness. [12]
6. GACIL products for nutrition and growth support
The product photos below are from the GACIL store. Select a product for its stated role and current label directions; buying every product is not a requirement for a balanced sugarcane programme.
GACIL Potassium Humate (Humic Acid)
A humic-based soil conditioner to consider for a planned root-zone programme during establishment and tillering. Follow the pack directions for the crop, dilution and soil or drip application.
GACIL Seaweed Liquid
An optional seaweed-based growth-support input during the crop’s labelled use stages. Follow its own dose and timing; keep the main fertilizer and irrigation programme in place.
GACIL Multi Micronutrient Liquid
A liquid trace-element option when its declared composition fits the crop’s needs. Compare it with Sugarcane Special before choosing a programme, and avoid overlapping routine applications.
Targeted nutrient options
GACIL Sugarcane Special Liquid
A sugarcane-focused micronutrient option to consider when its labelled composition matches the crop’s assessed need. Use the approved pack dilution and repeat interval.
GACIL Magnesium Sulphate
A source of magnesium and sulphur for a confirmed requirement. Magnesium is a secondary nutrient; select soil or foliar application according to the label and advice.
GACIL Zinc Sulphate Monohydrate 33%
A zinc source for a confirmed shortage. The 33% Zn formulation needs its own label rate rather than an assumed dose from another zinc product.
GACIL Potassium Sulphate 0:0:50
A potassium and sulphur source when the nutrient plan calls for it. Recalculate the potash budget if replacing MOP or another potassium fertilizer.
A product recommendation should follow the deficiency and nutrient budget. Yield and sugar recovery also depend on variety, weather, water, soil health, pest pressure and harvest maturity.
7. Frequently asked questions
Why are my sugarcane leaves turning yellow?
General paling, striped young leaves and dry older leaf margins point to different possible problems. Check leaf age, roots, soil moisture, pests and fertilizer history, then confirm with an appropriate soil or tissue test.
What fertilizer helps sugarcane tillering?
The crop needs an adequate, balanced nutrient supply and moisture during tillering. Correct a confirmed shortage and follow the local early-season split schedule; extra urea alone is not a complete tillering programme.
Can I use the same dose in every Indian state?
Use the example to understand timing and calculations. Obtain the applicable dose for your district, crop type, planting season and irrigation method from your KVK, agricultural university or mill agronomist.
Can liquid micronutrients replace the main fertilizer schedule?
Treat micronutrients as a supplement for their labelled nutrient role. They do not supply the bulk nitrogen, phosphorus and potassium quantities in the soil-fertilizer example.
Should I use humic, seaweed and liquid micronutrients together?
Each has a different role. Select inputs according to the crop, field assessment and label directions. Check compatibility before mixing, and compare general liquid micronutrients with Sugarcane Special to avoid overlapping trace-element applications.
Will damaged leaves become green after correction?
Judge progress mainly from healthy new growth and crop performance. Old scorched or dead tissue can remain damaged, so repeated spraying just to remove old marks may waste fertilizer.
Sources and further reading
The regional schedule is an educational example from the named NAU publication, not a claim that one historical blanket dose is the current prescription for every field. Use current local advice to adapt it. Nutrient symptom references are linked below.
- Navsari Agricultural University: plant-cane fertilizer table, 2019–20 publication
- Navsari Agricultural University: soil-test-based sugarcane recommendations, 2018
- Navsari Agricultural University: sugarcane water management and growth stages
- TNAU: sugarcane nitrogen deficiency
- TNAU: sugarcane phosphorus deficiency
- TNAU: sugarcane potassium deficiency
- TNAU: sugarcane iron deficiency
- TNAU: sugarcane zinc deficiency
- TNAU: sugarcane sulphur deficiency
- TNAU: sugarcane magnesium deficiency and correction
- TNAU: sugarcane boron deficiency
- ICAR–CCARI: sugarcane nutrient placement, crop care and maturity
- ICAR–Sugarcane Breeding Institute: soil-test-based nutrient management
- TNAU: sugarcane regional and plant/ratoon nutrition guidance
- Kerala Agricultural University: sugarcane nutrient deficiency guide
- 2024 field study: effect of humic acid on growth, yield and quality of sugarcane
- Jacomassi et al., 2022: seaweed extract and drought response in sugarcane
Written for GACIL · Prepared 29 October 2026 · The four field pictures are AI-generated illustrations, not diagnostic samples or evidence of product results. The seven product photos are actual images from the GACIL store.
