Table 5: Classification matrix obtained from STEPDISC analysis (from 2007 to 2010), and from MLP neural network (for 2010) considering cross-validation and using multispectral wavebands and spectral vegetation indices for cruciferous weeds, and wheat and broad bean crops.

Sampling yearsClassification methodsObservedPredicted spectra
spectraBroad beanWheatCruciferous weeds
(% of correct classification)

2007STEPDISCBroad bean10000
Wheat3925
Cruciferous weeds00100

2008Broad bean—*
Wheat1000
Cruciferous weeds0100

2009Broad bean
Wheat991
Cruciferous weeds199

2010Broad bean9901
Wheat2962
Cruciferous weeds2197

2010MLPBroad bean9712
Wheat01000
Cruciferous weeds1297

*Data not sampled.