Rubber (Hevea brasiliensis)

Age of rubber Dose of NPK Mg/NPK(kg/ha/year) Fertilizers (gram/plant)
Urea (26% N) Rock phosphate(18% P2O5) Muriate of Potash (60%K 2 0) Magnesium Sulphate(16%MgO)
April-May Sep-Oct April-May Sep-Oct April-May Sep-Oct April-May Sep-Oct
First year # 20:20:8:3 - 100 - 250 - 30 - 40
Second year 40:40:16:6 100 100 250 250 30 30 40 40
Third year 50:50:20:7:5 120 120 300 300 40 40 50 50
Fourth year ** 40:40:16:6 100 100 250 250 30 30 40 40
From fifth year till tapping a) With cover crops 30:30:30 80 80 200 200 65 65 - -
b) With natural cover 60:40:24 165 165 275 275 50 50 - -
Rubber under tapping## 30:30:30 80 80 200 200 65 65 - -
    * Considering a stand of 445 plants 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.
    # When budded stumps are planted, only half the recommended quantity should be applied during first year.
    ## For plantations with magnesium deficiency symptom (interveinal yellowing of leaves during September-December period), 50 kg of magnesium sulphate/ha is recommended.