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SL404/SS617: Iron (Fe) and Copper (Cu) for Citrus Trees
HS-797/CH142: A Guide to Citrus Nutritional Deficiency and Toxicity Identification
Citrus Trees: 7 Common Problems
Frontiers | Nutrient Deficiency Tolerance in Citrus Is Dependent on Genotype or Ploidy Level
Plants | Free Full-Text | Effects of Nitrogen Deficiency and Resupply on the Absorption of Mineral Nutrients by Tangor Cultivar ‘Shiranuhi’ (Citrus unshiu × C. sinensis) Grown in a Hydroponic System
Why are the Leaves on Your Lemon Tree Turning Yellow?
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Listen to Your Lemons – what are your citrus trees trying to tell you? | GlobalNet Academy
How to treat Iron Deficiency | Yates
Identifying nutritional deficiencies in backyard plants | Agriculture and Food