Why we should be encouraging Nightcrawlers and using Latex on our fields?

Luckily I have an American sitting across the office from me to translate and I am reliably informed Nighcrawlers are “big fat worms” – thanks Kathy.  The video below is a fantastic illustration of how beneficial these magnificent creatures can be in developing our soils structure and improving water penetration and drainage.

What a great way of illustrating the state of soil structure on farm.  Should farmers start using Latex on their soils to see how well worm activity is improving their soils, if at all?  It would be great to see this on some UK soils to get an impression of the soil structure the fissures, worm activity and possible barriers that were in the soil.