Crusty earth to vegetation

It is great to witness the power of vegetation.  It is surprising, too, that earth can turn crusty and it can let vegetation in.  Here what I am talking about in photo.  First, a barren batch, crusty earth:

Now, some vegetation, it seems to better hold the earth below.  I find amazing that those delicate greenery could pierce the crusty layer of earth:

Now, the trees to the mix:

Okay, there is also some plants too, on various heights.  Vegetation is strong.  I am tempted to write something on agressive plants and trees.  Would be a good horror movie!