Effects of Irrigation with Treated Wastewater on Root and Fruit Mineral Elements of Chemlali Olive Cultivar

Table 4

Roots Zn and Mn contents in the three treatments: rainfed (RF), well water (WW), and treated wastewater (TWW) in “on” and “off” year.

Parameter	Year	Off (2003)			On (2004)
		RF	WW	TWW	RF	WW	TWW
Zn (mg kg^−1)	Winter	18^cA	22^bA	28^aA	10^cA	16^bA	20^aA	ns
	Spring	12^cB	15^bB	22^aA	12^bA	13^bA	16^aA	ns
	Summer	7^cC	9^bC	12^aB	12^bA	13^bA	16^aA	ns
	Autumn	11^cB	22^bA	25^aA	13^bA	14^bA	17^aA	**
Mn (mg kg^−1)	Winter	10^cB	13^bB	24^aB	14^cA	17^bA	24^aA	ns
	Spring	11^bB	12^bB	23^aB	7^bB	8^bB	26^aA	ns
	Summer	15^cA	19^bA	31^aA	6^cB	9^bB	11^aC	**
	Autumn	18^cA	22^bA	32^aA	5^cB	9^bB	18^aB	***

Small letters indicate significant differences (𝑃≤0.05) among treatments within each season and for each year according to LSD test. Capital letters indicate significant differences (𝑃≤0.05) among seasons within each treatment and for each year according to LSD test. Asterisk indicates significant differences between years (mean values of RF, WW and TWW): nonsignificant (ns) and significant at 𝑃≤0.01 (**) and 𝑃≤0.001 (***) according to LSD test.