It is generally advantageous to sow pasture seeds with a companion grazing nurse crop . 一般在播种草种时,同时播种放牧保护作物是有好处的。
This compares to the vast areas , up to 300 million hectares , of native or unimproved pastures used for grazing livestock and the 28 - 30 million hectares of sown pastures 这与近3亿公顷的天然或未改造牧场及2 . 8 ~ 3千万公顷的播种牧场的巨大面积形成了对比。