Yield Gap Analysis: Implications for Research and Policy

Interactions between plant
nutrient status and disease
become more prominent at
high yield levels:
For many crops, there is often
a positive relationship between
leaf N concentration and the
prevalence and severity of
several foliar diseases. In this
case, sheath blight on rice in
Vietnam. Hence, a critical
need to precisely balance N
supply with crop demand
without excess or deficiency.