Figure 1. Reflectance spectra of cotton leaves at different sample preparations.

(A) Reflectance spectra pattern of fresh and intact leaves. (B) Reflectance spectra pattern of fresh and removed leaves. (C) Reflectance spectra pattern of dried and ground leaves that were scanned using the PhoneLab^™. The reflectance spectra were comparable between fresh and intact and fresh and removed cotton leaves; however, the reflectance spectra of dried and ground cotton leaves were distinctive from fresh cotton leaves.