Table 1.

Influence of a one-time iodine fertilization over two seasons, applied in 2010 by means of soil drenches, on the yield of selected crops.

Crop	Kohlrabi		Butterhead lettuce				Radish
Cultivation year	2010				2011
Iodine form	I-	IO3-	I-	IO3-	I-	IO3-	I-	IO3-
Treatment dose [kg I ha-1]	Relative crop yield [%]
0	100.0 a	100.0 a	100.0 a	100.0 a	100.0 a	100.0 a	100.0 a	100.0 a
1.0	90.2 a	98.6 a	97.9 a	92.0 a	103.1 a	93.9 a	108.6 a	94.0 a
2.5	93.1 a	106.5 a	91.7 a	94.3 a	99.4 a	105.5 a	94.4 a	100.0 a
7.5	79.6 a	100.2 a	85.2 a	94.2 a	113.4 a	102.1 a	85.8 a	97.1 a
15	72.1 a	95.5 a	73.6 a	72.7 a	107.0 a	98.1 a	90.5 a	89.2 a
One-way ANOVA (p-value)	NS (0.181)		NS (0.389)		NS (0.992)		NS (0.059)

Fresh matter yield is expressed as percent of the unfortified control treatment (n = 3). Percentages with same letters do not differ (contrast calculated between sources) according to Bonferroni MCP at a = 0.05. Levels of significance are represented by ^∗p < 0.05, ^∗∗p < 0.01, and ^∗∗∗p < 0.001, and NS, not significant = p > 0.05.