Question

nutrients present in the soil for the growth of rubber and its percentage

Answer 1

Soil fertility status (0 to 30 cm depth) in rubber fields (n = 2,102) ofTripura.Organic C (OC)Soil statusOC contentin soil, %No ofsamples%SamplesFertilizer NrecommendationCommon application,kg N/haLow 0.5 to 0.75 726 35 Raise by 15 to 20% 42 to 45Medium 0.75 to 1.5 1,284 61 Raise by 0 to 5% 35 to 38High >1.5 92 4 Lower by 5 to 10% 30 to 32Available P (Bray-P2 extractable)Soil statusAvail. P,mg/100gNo ofsamples%SamplesFertilizer PrecommendationCommon application,kg P2O5/haLow <1 2,040 97 Raise by 15 to 20% 42 to 45Medium 1 to 2.5 44 2.2 Raise by 0 to 5% 35 to 38High >2.5 18 0.8 Lower by 5 to 10% 30 to 32Available K (Sodium acetate extractable)Soil statusAvail. K,mg/100gNo ofsamples%SamplesFertilizer KrecommendationCommon application,kg K2O/haLow <5 1,150 55 Raise by 15 to 20% 40 to 45Medium 5 to 12.5 876 42 Raise by 0 to 5% 35 to 38High >12.5 76 3 Lower by 5 to 10% 30 to 32