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Table 7 Effect of soil application of humic acid and bio-humic on leaf microelements 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

TreatmentsFe (ppm)Mn (ppm)Zn (ppm)Cu (ppm)
1st season2nd season1st season2nd season1st season2nd season1st season2nd season
T1 = Control30 c32 c23 c21 c16 d18 d4.50 c4.38 c
T2 = Organic matter51 b50 b33 b30 b23 c24 c6.00 b6.05 b
T3 = T2 + humic acid55 ab57 ab36 ab35 ab30 b32 b6.51 ab6.73 ab
T4 = T2 + bio-humic61 a65 a41 a42 a35 a37 a7.56 a7.64 a
  1. Means within a column followed by different letter(s) are statistically different at 5% level