English: biosecurity barrier
Welsh: rhwystr bioddiogelwch
Subject: Amaeth
English context:  * � Biosecurity barriers - shelterbelts located on farm boundaries can provide valuable biosecurity barriers between neighbouring focks and herds. [1]
Welsh context: Gall lleiniau cysgodi ar ffiniau ffermydd greu rhwystr bioddiogelwch gwerthfawr rhwng eich diadell neu'ch buches chi a rhai'ch cymdogion.
Plural: rhwystrau bioddiogelwch