David Robson says planting the root ball this way will improve growth.

罗宾逊表示，通过这个方式种植后将加速植物生长。

youdao

So his advice is to pull the plant out of the container, then cut the bottom half of the root ball into four parts.

所以，他建议将植物从容器中取出来，将底下一半的球状根系切成四部分。

youdao

With a newly planted tree, the roots have not yet spread out from the root ball.

对于一棵新种植的树，它的根尚未从根球中散开。

youdao

But you do have to remember by butterflying, you are cutting down the overall height of that root ball.

VOA: special.2011.04.19

The bottom of the root ball will look something like the spread-open wings of a butterfly.

VOA: special.2011.04.19

At the base of the hair root is a small ball-like formation called a bulb.

VOA: special.2011.04.05

We will long debate whether at a very important moment in our efforts to root out terrorism particularly in Afghanistan and on that border region with Pakistan, whether we took our eye off the ball.

WHITEHOUSE: Press Briefing