Of the features they were able to assess, 20% were in a favourable condition, 30% in an unfavourable condition and 50% not in a desired state.
O'r nodweddion yr oeddent yn gallu eu hasesu, roedd 20% mewn cyflwr ffafriol, 30% mewn cyflwr anffafriol a 50% ddim yn y cyflwr a ddymunir.