Bulletin of the National Research Centre

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

Treatments	Fe (ppm)		Mn (ppm)		Zn (ppm)		Cu (ppm)
Treatments	1^st season	2^nd season	1^st season	2^nd season	1^st season	2^nd season	1^st season	2^nd season
T1 = Control	30 c	32 c	23 c	21 c	16 d	18 d	4.50 c	4.38 c
T2 = Organic matter	51 b	50 b	33 b	30 b	23 c	24 c	6.00 b	6.05 b
T3 = T2 + humic acid	55 ab	57 ab	36 ab	35 ab	30 b	32 b	6.51 ab	6.73 ab
T4 = T2 + bio-humic	61 a	65 a	41 a	42 a	35 a	37 a	7.56 a	7.64 a

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

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