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Table 6 Effect of soil application of humic acid and bio-humic on N, P, K, Ca, and Mg leaf mineral content of Kalamata olive trees

From: Effect of soil application of humic acid and bio-humic on yield and fruit quality of “Kalamata” olive trees

Treatments

N (%)

P (%)

K (%)

Ca (%)

Mg (%)

1st season

2nd season

1st season

2nd season

1st season

2nd season

1st season

2nd season

1st season

2nd season

T1 = Control

0.97 d

1.00 d

0.10 d

0.11 d

0.99 d

0.96 d

0.63 d

0.65 d

0.08 d

0.09 d

T2 = Organic matter

1.10 c

1.24 c

0.13 c

0.15 c

1.14 c

1.16 c

0.78 c

0.77 c

0.10 c

0.11 c

T3 = T2 + humic acid

1.46 b

1.54 b

0.17 b

0.19 b

1.23 b

1.24 b

0.98 b

0.96 b

0.13 b

0.14 b

T4 = T2 + bio-humic

1.92 a

1.98 a

0.19 a

0.21 a

1.35 a

1.38 a

1.19 a

1.20 a

0.17 a

0.16 a

  1. Means within a column followed by different letter(s) are statistically different at 5% level