select superior tree 优树选择
superior tree selection 优良单株选择
masson pine superior tree 马尾松优树
Selection of superior tree 优树选择
Through the practice of superior tree collection at Shuigou Forest Farm of Luoping county since 1999, a set of technology on establishment of superior tree collection site was summarized.
通过自1999年在罗平县水沟林场开始的杉木优树家系收集建设的实践，总结完善了杉木优树收集区的营建配套技术。
However, suppose that a tree falls on the superior pig before it has produced offspring.
然而，假定在这只良种猪产出小猪以前，它被一棵倒下来的树压死了。
The two-part rubber tree (Hevea brasiliensis) is a superior clone grafted on a seedling family.
在橡胶树优良有性系实生苗上嫁接优良无性系，即形成两合树。
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