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Table 6 Effect of applied N P and K on soil pH, organic carbon (OC), available nitrogen (AN), available phosphorus (AP) and available potassium (AK) at CSIR-IHBT

From: Crop-ecology and nutritional variability influence growth and secondary metabolites of Stevia rebaudiana Bertoni

Treatment pH OC (%) AN (kg ha −1 ) AP (kg ha −1 ) AK (kg ha −1 )
2010 2011 2010 2011 2010 2011 2010 2011 2010 2011
Nitrogen Level           
N30 6.59 5.88 2.41 2.15 222.83 327.88 62.51 59.42 549.55 486.38
N60 6.35 5.85 2.40 2.02 212.72 319.35 67.65 55.12 557.75 494.15
N90 6.26 5.83 2.57 2.20 205.06 310.11 64.67 66.34 544.66 504.70
SEm(±) 0.08 0.04 0.12 0.10 7.87 12.08 4.33 7.42 10.02 19.85
CD(P = 0.05) 0.22 NS NS NS NS NS NS NS NS NS
Phosphorus Level           
P20 6.42 5.86 2.5 2.07 210.57 326.84 65.08 61.33 540.33 495.35
P40 6.39 5.85 2.43 2.18 216.50 311.39 64.81 59.26 560.98 494.81
SEm (±) 0.06 0.03 0.10 0.08 6.43 9.86 3.53 6.06 8.18 16.20
CD(P = 0.05) NS NS NS NS NS NS NS NS NS NS
Potassium Level           
K20 6.47 5.86 2.56 2.01 215.69 327.01 67.13 52.07 548.45 478.68
K40 6.42 5.82 2.37 2.25 208.89 314.29 57.99 67.85 559.35 503.53
K60 6.33 5.89 2.46 2.11 216.03 316.03 69.7 60.96 544.17 503.02
SEm (±) 0.08 0.04 0.12 0.10 7.87 12.08 4.33 7.42 10.02 19.85
CD(P = 0.05) NS NS NS NS NS NS NS NS NS NS
Interaction effect           
CD of N × P NS NS NS NS NS NS NS NS NS NS
CD of N × K NS NS NS NS NS NS NS NS NS NS
CD of P × K 0.31 NS NS 0.47 NS 49.08 NS NS NS NS
CD of N × P × K NS NS NS NS NS NS NS NS NS NS
  1. N1, N2 and N3 are the level of nitrogen @ 30, 60 and 90 kg ha−1, respectively. P1 and P2 are the level of phosphorus (P2O5) @ 20 and 40 kg ha−1, respectively, while K1, K2 and K3 are representing the level of potassium (K2O) @ 20, 40 and 60 kg ha−1, respectively.