Use a training case or your own documented observations. Include three image scales, chronology, affected and unaffected locations and previous interventions.
Practise and review
Practical workbook← All books
Understanding crop problems
Contents · choose a chapter or topic
Records that make sense
When something goes wrong
Finish the crop properly
The process
In the field
- 10Describe what changed before naming a disease
- 11Describe what changed before naming a disease · continued
- 12Write it in your farm notebook
- 13Protect the workflow while the cause is investigated
- 14Useful low-disturbance checks
- 15Compare explanations and look for evidence against them
- 16Practice investigation: pins fail only near the inlet
- 17Close the investigation with a prevention change
- 18Close the investigation with a prevention change · practical sequence
- 19Where the field guidance comes from
Observation & Pattern
- 20Observation & Pattern
- 21Describe first, name later
- 22The five facts
- 23Reading the pattern
- 24Mushroom sign or room sign?
- 25Read the numbers in context
- 26Read the numbers in context
- 27A ten-minute observation walk, daily this week
- 28Avoid these mistakes
- 29Check your understanding
- 30Check your understanding
- 31Check your understanding
- 32Words used in this lesson
- 33Sources and field reference
Differential Diagnosis
- 34Differential Diagnosis
- 35Three bins, not one
- 36The environmental bin has numbers
- 37Infectious and pest signs that look alike
- 38Order the tests, act on the first cause
- 39Read the numbers in context
- 40Read the numbers in context
- 41Read the numbers in context
- 42Build a three-column differential for one live problem
- 43Avoid these mistakes
- 44Check your understanding
- 45Check your understanding
- 46Check your understanding
- 47Words used in this lesson
- 48Sources and field reference
Evidence & Negative Evidence
- 49Evidence & Negative Evidence
- 50Evidence that splits the decision
- 51Negative evidence
- 52A case, step by step
- 53Process records as confirmation
- 54Read the numbers in context
- 55Read the numbers in context
- 56Read the numbers in context
- 57Write one evidence chain end to end
- 58Avoid these mistakes
- 59Check your understanding
- 60Check your understanding
- 61Check your understanding
- 62Words used in this lesson
- 63Sources and field reference
Biosecurity & Chemical Caution
- 64Biosecurity & Chemical Caution
- 65Control the routes
- 66Contain first, then treat
- 67The India label gate
- 68Why old lists cannot be copied
- 69Read the numbers in context
- 70Read the numbers in context
- 71Read the numbers in context
- 72Close the routes this week
- 73Avoid these mistakes
- 74Check your understanding
- 75Check your understanding
- 76Check your understanding
- 77Words used in this lesson
- 78Sources and field reference
Practise and review
Sources and next steps
English learning edition · Independent technical review pending. Keyboard: focus the reading page and use ← / →. Page turning does not mark practical competence.