Predicting N status in maize with clip sensors: choosing sensor, leaf sampling point, and timing

Adjusted N fertilization is a key factor to increase N fertilizer efficiency and chlorophyll leaf clip sensors can help to improve it.

This study tried to identify the ability of two different devices for maize N status identification and yield prediction. The study demonstrated that leaf sensors presented similar results. Moreover, valuable information for a proper sampling protocol was obtained with this study, proving that the sampling position (in the leaf and in the plant) and sampling time were crucial for estimation of the maize N status.