Crop Variety ^) Threshold *) (ECe in dS/m) Class Potato x) Mignonne #) 4.1 slightly sensitive Achilles 2.9 sensitive Foc 2.1 sensitive Met 1.9 very sensitive "927" 3.4 sensitive Carrot Cas 4.5 slightly sensitive Ner 3.6 sensitive Nat < 1 very sensitive Ben < 1 very sensitive "101" 3.0 sensitive "102" 5.0 slightly sensitive Pri 2.1 sensitive Onion Alo 2.4 sensitive Red 5.9 slightly sensitive San 3.2 sensitive Hyb 3.4 sensitive Lettuce Batavia H < 1 very sensitive Batavia S 2.3 sensitive Butterhead L 1.8 very sensitive Cabbage White cabbage #) 4.6 slightly sensitive Broccoli 5.6 slightly sensitive Barley Que 2014 3.3 sensitive +) Que 2015 1.7 very sensitive +)