Figure 4
From: Unmanned aerial platform-based multi-spectral imaging for field phenotyping of maize
Relationship between grain yield and low-N stress index. Light gray circles are for data from 0 to 40 N rates and dark gray circles from 40 to 160 N rates. Replicated data from 10 hybrids were used (*P ≤ 0.05, ***P ≤ 0.001).