Spectroradiometer ASD FieldSpec 4 HiRes Spectroradiometer ASD FieldSpec 4 Wide-Res Spectroradiometer Spectral Evolution SR2500 Integrating sphere RTS-3ZC LAI-2200C Plant Canopy Analyzer CCM-300 chlorophyll content meter Gas exchange system with IR detection LI-6400XTP firmy LI-COR