Predicting Winter Wheat Grain Yield Using Fractional Green Canopy Cover (FGCC)

Figure 3

Relationship between RI (response index) of each sensor (NDVI or FGCC) and yield. RI refers to the ratio between the value (either yield or sensor value) from the N-Rich Strip and the farmer practice (FP). The x-axis refers to the RI_Sensor, and the y-axis refers to the RI_Yield. The gray dashed line represents the 1 : 1 line, or where the RI_Sensor = RI_Yield. The thick black line describes the current RI adjustment equation utilized by Oklahoma State University. To develop a prediction model, RI_Sensor undergoes a transformation in order to make the relationship of RI_Yield:RI_Sensor closer to 1 : 1.