Foxhole reforestation - a method for the reforestation of grasslands

The search engine Ecosia and several NGOs are using a technique for reforestation called "Foxhole" to plant trees, and ultimately forests, in grasslands.
The technique is to dig out the grass in circles, seed legumes (pigeon pea in their case), pioneer, and other tree species in there. The method is cheaper than transplanting nursery-grown saplings, and has a higher success rate.
Planting trees in grasslands is always difficult, as the root competition is difficult for the trees in the first few years.

Here the video

Excellent video hans, thanks for sharing!
I found it interesting that the depression they dug was more for fire resistance than for water catchment. It is surprising to me that this technique apparently works so well. I suppose it is mainly due to the species that they plant initially to create the microclimates that shelter the next generation of trees. They say towards the end of the video that some of the final trees they plant out as saplings; once the environment is more conducive to them surviving. Getting the local population on board being a key part to the success of the scheme.