Yellow margins and necrotic edges, especially on lower leaves; leaves may curl up or down; root tips may be necrotic are all symptoms of what type of toxicity?

Yellow margins and necrotic edges, especially on lower leaves; leaves may curl up or down; root tips may be necrotic are all symptoms of what type of toxicity?



a) Nitrogen

b) Calcium

c) Ammonium

d) Sulfur



Answer: c) Ammonium


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Biology

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