18 January 2017

Reflectance Measurements in Cotton Fields

Dr. Glen Ritchie of the University of Georgia has used model PS-100 spectroradiometer to take reflectance measurements in cotton fields and estimate defoliation. Chlorophyll gives plant leaves a reflectance spectrum characteristically different from that of soil. Reflectance measurements can be reported in µmol m-2 s-1, W m-2, or as a relative value.

View poster presented at ASA meeting.


Spectroradiometer used for reflectance measurement

Application Summary


Summary
Estimating defoliation of cotton using reflectance data.

Sensors Used
PS-100 Spectroradiometer

Organization
University of Georgia

Location
Georgia

Original Article
Ritchie, G.L. and C.W. Bednarz. 2005. Estimating defoliation of two distinct cotton types using reflectance data. J. Cotton Sci. 9:182-188.

Poster from ASA meeting 2006

12 January 2017

Irrigation Study

Dr. Joan Girona of the Institute of Agroalimentary Research and Technology in Catalonia, Spain, is studying irrigation and the water and nutrient needs of fruit trees.

He needed to capture pyranometer readings throughout his orchard. Dr. Girona mounted Apogee pyranometer sensors and Campbell Scientific dataloggers on a carefully laid out model train track around the orchard. The train carrying the pyranometer sensors and dataloggers wound around the track and could take measurements at specified intervals. Dr. Girona could then take thousands of measurements. His system was so effective he plans to continue running it for more experiments in the future.

Learn more about Dr. Girona’s experiment by reading the original article on Campbell Scientifics’ website.

Apogee silicon-cell pyranometer used in irrigation study

Application Summary


Summary
Pyranometer mounted on model train to collect measurements in orchard for irrigation study.

Sensors Used
Silicon-cell Pyranometer

Organization
Institute of Agroalimentary Research and Technology

Location
Catalonia, Spain

Original Article
Spain: Irrigation and Solar Radiation - Campbell Scientific