Arugula / rocket 20 g →20 L 25 m row Drench at 2-leaf and again 10 d later; Zn & Mn boost auxin for uniform leaves. Market-class brassicas and lettuces demand a~3 : 1 : 3 N-P-K ratio to support rapid leaf expansion without the hollow-stem and tip-burn often triggered by excess nitrogen.
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