Identify common plant nutrient deficiencies and injury symptoms.

Identification should include

• evaluating plant for
  • stunted growth
  • premature bloom
  • chlorosis
  • interveinal chlorosis
  • purplish-red coloring
  • necrosis
  • allelopathic effects
• explaining how the nutrients that are deficient are associated with the symptom
• evaluating plant for
  • insects and wildlife injury
  • mechanical injury (e.g., equipment)
  • chemical injury (pesticides, herbicides)
  • environmental injury (e.g., weather).

Process/Skill Questions:

• What are the symptoms of a nitrogen deficiency? A magnesium deficiency? A phosphorus deficiency?
• Where might you find resources for analysis of plant nutrient deficiency?
• What is an example of an allelopathic effect on a crop?