Varieties of :
Modern dwarf, EC-68415C, MSFH-1, MSFH-8, Surya, Ramson, NSFH, SH-3322, PSH-50.
A seed rate of 6-8 kg/ha for rainfed and 5-6kg/ha for irrigated sunflower is generally recommended. The spacing varies from 20 to 30 cm (plant to plant) and 60 to 80 cm ( row to row direction) depending upon soil, variety and method of irrigation.
Growth period and water requirement :
| Stage of Growth | |||||
| Parameter | Initial Stage | Crop Development | Mid-Season | Late Season | Growth Period |
| Duration days | 20-25 | 35-40 | 40-50 | 25-30 | 120-130 |
| ETm (mm) | 20% | 25% | 45% | 10% | 600-1000 |
| Kc | 0.3-0.4 | 0.7-0.8 | 1.05-1.2 | 0.70-0.80 | - |
Sprinkler Irrigation recommendation from Premier Range:
As the crop is a closely spaced crop, sprinkler irrigation is ideal for irrigation. The recommended models of sprinklers are M110ST & RAYNTM normally spaced at 12m x 12m or M150ST sprinklers spaced at 18m x 18m.
The sprinkler application rates should not exceed the safe intake rate of the soil to avoid run-off and wastage of water. Refer to the table below for basic intake rates of soils:
| S No. | Soil Type | Good Soils with High Organic Content | Poor Soils with Low Organic Content |
|---|---|---|---|
| 1. | Coarse sand | 20 to 25 mm/hr | 12.5 mm/hr |
| 2. | Fine sand | 12.5 to 20 mm/hr | 9.00 mm/hr |
| 3. | Fine sandy loams | 12.50 mm/hr | 7.50 mm/hr |
| 4. | Silt loams | 10.00 mm/hr | 6.85 mm/hr |
| 5. | Clay loams | 7.50 mm/hr | 6.35 mm/hr |
Fertilizer Recommendation :
| Irrigation Method | N-P-K dose kg/ha |
|---|---|
| Rain-fed sunflower | 50-30-60 |
| Irrigated sunflower | 100-60-120 |
Glossary
Kc = Crop co-efficient.
ETo = Reference evapo-transpiration (mm)
ETm = Maximum evapo-transpiration = Kc x ETo (mm)
ETa = Evapo-transpiration actual (mm)
Ya = Actual yield
Ym = Maximum yield
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Note: The advice and descriptions given herein are for general information only. Premier Irrigation cannot be held responsible for its use or application