multiple
adj.
多样的,多重的
n.
倍数,若干
v.
成倍增加
在此我理解multiple是成倍的,成倍减少保护区的产品
是指玉米种子,根据下面一段话意思,好象减少到5%
THE NUMBER of refuge acres required for crops from multi-stacked seeds is decreasing thanks to new technology from seed companies.The first big drop in refuge acres comes with the new SmartStax seed that needs only a 5% refuge compared to 20% for other traited seed.Codeveloped by Monsanto and Dow AgroSciences,SmartStax will be widely available for planting next year.