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Rating Forage Standing Dead Matter

I have developed a simple computer method which can estimate the percent of standing dead forage in a grass sample.  
In order to determine its merit, I would like to compare the accuracy of the computer program against the accuracy of a visual estimate. 

Please take a moment to look of the 16 mages pictured in this questionnaire.  
Using the key pictured above each picture as a guide, please estimate the percent of dead (brown/tan) forage in each sample. 

Thank you so much for your assistance.  

There are 16 questions in this survey.