Table 4.

Effect of varied N supply on the shoot concentration and uptake of Fe and Se in 25-days-old maize plants grown under different Fe and Se soil treatments.

Micronutrient	Micronutrient Treatment a	Shoot Concentration c,e		Shoot Uptake d,e
		Low N b	Adequate N b	Low N b	Adequate N b
Fe	No treatment	29.2 ± 2.8 Aa	47.2 ± 3.7 Ab	92.3 ± 4.4 Aa	147.4 ± 17.9 Ab
	Adequate	42.6 ± 2.5 Ba	71.0 ± 2.9 Bb	137.7 ± 9.6 Ba	222.3 ± 25.6 Bb
Se	No treatment	0.04 ± 0.01 Aa	0.05 ± 0.01 Aa	0.1 ± 0.0 Aa	0.2 ± 0.0 Aa
	Adequate	0.85 ± 0.03 Ba	0.88 ± 0.08 Ba	2.7 ± 0.2 Ba	2.8 ± 0.4 Ba

^a Data for 25 days old maize plants grown at different Fe (0 and 10 mg of Fe kg⁻¹ of soil) and Se (0 and 0.02 mg of Se kg⁻¹ of soil) supply on micronutrient deficient soil under greenhouse conditions. ^b N treatments: low (125 mg of N kg⁻¹ of soil) and adequate (250 mg of N kg⁻¹ of soil). ^c Concentration measured in mg kg ⁻¹ per micronutrient. ^d Uptake measured as μg of micronutrient/plant. ^e Values are means of four independent replicates. ^e The average of 4 independent replicates makes the mean values presented and those in column followed by different uppercase letters and in a row followed by different lowercase letters are significantly different by Turkey test at the 5% level.