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
Biology MCQ
Biology
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?