Timing is key when killing off cover crops with one expert suggesting a herbicide needs to be used some three to four weeks before a spring crop is drilled. Some species in a cover crop mix can be killed easily, but more persistent ones, such as fodder radish, may need up to a month to be controlled by a weedkiller such as glyphosate. Cover crops are becoming more popular across many farms to prevent nitrogen leaching into water courses in […]