单词	rootstock
释义	rootstock /ˈruːtstɒk / noun 1A rhizome.Conventional tillage is effective for reducing populations of many biennial and perennial weeds that may arise from rhizomes or rootstocks.... In addition, weeds left uncontrolled may harbor insects and diseases and produce seed or rootstocks which infest the field and affect future crops. It propagates itself by seeding and by creeping rootstock, so keep an eye on it and limit its growth. 2A plant on to which another variety is grafted.When we were first setting out, we grew our own rootstock and grafted the cultivars ourselves.... The 1999 season was devoted to orchestrating the necessary nursery work in California to get the varieties they had chosen grafted on to rootstocks suitable for their soils. All of these qualities vary with the species of fruit tree, the variety, and rootstock. 2.1A primary form or source from which offshoots have arisen: the rootstock of all post-Triassic ammonites
随便看	muti murder muti murderer mutineer mutineering mutinous mutinously mutinousness mutiny mutism mutograph muton mutoscope mutsaddi Mutsu mutsuddy Mutsun Mutsu-n mutt Muttaburrasaurus Mutt and Jeff mutter mutterance mutterer muttering mutteringly

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