Complex Fertilizers for rubber
4th year (40-40-16-6 kg/ha)
| Straight Fertilizers | ||
|---|---|---|
| Fertilizer | Recommended Dose (kg) | Remarks |
| Urea | ||
| Rajphos / Mussooriphos | ||
| Muriate of Potash | ||
| Magnesium sulphate | ||
| Complex Fertilizers | |||||
|---|---|---|---|---|---|
| Complex Fertilizers | Recommended Dose (kg) | Additional Fertilizers Required | |||
| Urea (kg) | Rajphos/Mussooriphos (kg) | Murate of Potash (kg) | |||
| 19 all (19-19-19) | 0 | 0 | 0 | 0 | |
| 17 all (17-17-17) | 0 | 0 | 0 | 0 | |
| 15 all (15-15-15) | 0 | 0 | 0 | 0 | |
| 10 all (10-10-2010) | 0 | 0 | 0 | 0 | |
| 10-10-2004 | 0 | 0 | 0 | 0 | |
| Bone meal (3.5-21-0) | 0 | 0 | 0 | 0 | |
| DAP (18-46-0) | 0 | 0 | 0 | 0 | |
| Factomphos (20-20-0-13) | 0 | 0 | 0 | 0 | |
| Ammonium phosphate (20-20-0) | 0 | 0 | 0 | 0 | |
| Ammonium sulphate (20.5-0-0) | 0 | 0 | 0 | 0 | |
| Ammonium nitrate (33.5-0-0) | 0 | 0 | 0 | 0 | |
| Calcium ammonium nitrate (25-0-0) | 0 | 0 | 0 | 0 | |
| Ammonium sulphate nitrate (26-0-0) | 0 | 0 | 0 | 0 | |
| Nitrate of soda (16.5-0-0) | 0 | 0 | 0 | 0 | |
| SSP (0-18-0) | 0 | 0 | 0 | 0 | |
Remarks:
- In the year of planting, fertilizer application is done 2-3 months after planting ie., during September-October.
- From second year onwards, the fertilizers should be applied in two equal splits during April-May (pre-monsoon) and September-October (post-monsoon) when there is enough moisture in the soil.
- Considering a stand of 445 during the initial four years.
- For plantation without cover crop, the third year recommendation may be continued during fourth year also.
- Magnesium is recommended for plantations in Thiruvananthapuram, Kollam, Alappuzha, Pathanamthitta, Kottayam, Idukki and Ernakulam districts in the traditional belt. It is not recommended for the rest of the area as the available Mg status is high.
- For plantations with magnesium deficiency symptom (intervenial yellowing of leaves during September-December period), 50 kg of magnesium sulphate/ha is recommended.
- As zinc deficiency is commonly noticed especially in young rubber, zinc sulphate application @ 25 kg/ha or 50g/plant mixed with equal quantity of farm yard manure or top soil (for uniform distribution) two weeks after the post monsoon fertilizer application during the year of planting is advocated as an ad hoc recommendation.
