Castor ( Ricinus communis )
Application of Organic Manures
Spread 12.5 t/ha of FYM or compost evenly on the main field before last ploughing and incorporate in to soil by working a country plough. Apply 30 kg sulphur/ ha through gypsum at the time of last ploughing for higher castor yield.
NOTE: Do not leave FYM or compost exposed to sunlight as nutrients will be lost.
Application of Fertilizers
Fertilizer
Apply NPK fertilizers basally as per soil test recommendations as far as possible. If soil test recommendations are not available, follow the blanket recommendation as follows
| Recommended NPK kg/ ha | |
| Rainfed conditions | |
| Varieties | 45 : 15 : 15 NPK kg / ha |
| Hybrids | 60 : 30 : 30 NPK kg / ha |
| Irrigated condition | |
| Varieties | 60 : 30 : 30 NPK kg / ha |
| Hybrids | 90 : 45 : 45 NPK kg / ha |
- In rainfed situations apply 100% P & 50% N&K basally & remaining quantity may be applied in one or two top dressings based on the soil moisture availability.
- In irrigated situations apply 100% P & 50% N&K as basal & remaining quantity N&K may be applied in two equal splits at 30th & 60th DAS.
- Apply 12.5 kg ZnSO4 ha-1 (if the soil available Zn is < 1.2 ppm) and 25 kg FeSO 4 ha-1 (if the soil available Fe is < 3.7 ppm for non calcareous soil and < 6.3 ppm for calcareous soil )
Seed Production
- Apply NPK @ 60 : 60 : 20 kg NPK/ha as basal
Hybrid Seed Production
- Apply NPK @ 90:70:70 kg/ha