What had once been swamp became firm and hard ground, with tree seedlings taking root on its east side.
Allow tree seedlings to grow for a year before bonsai training begins.
The student who plants the most tree seedlings is given an award.
If left to flourish, however, the tree seedlings could mean serious future trouble.
Lukens and his assistants grew more than 60,000 experimental tree seedlings at the nursery.
One result is that there's a better growth of tree seedlings than in plots without boar.
Most tree seedlings require small gaps produced by falling trees in order to regenerate.
Technology to increase survival of tree seedlings in arid regions has been developed.
They did this by clearing brush, building access roads and hand planting thousands of tree seedlings.
This is 11,000 tree seedlings short of the 55,00 targeted for 2009.