Leaf Area Duration (LAD) represents the
persistence of leaf area over time.
It integrates leaf area index with duration
and indicates the crop’s photosynthetic capacity.
Formula Used
LAD = (LAI₁ + LAI₂) ÷ 2 × (t₂ − t₁)
Where:
• LAI₁ = Leaf Area Index at time t₁
• LAI₂ = Leaf Area Index at time t₂
• t₂ − t₁ = Time interval (days)
Enter Observations
Interpretation:
• Higher LAD → longer photosynthetic activity
• Strongly correlated with dry matter production
• Used in crop growth analysis & yield prediction
