That was the typical advice back when I learned all about tortoises in the late 80s and early 90s. Compressed grass bedding... Supposed to be the next best thing since we were all using rabbit pellets at the time. Alfalfa (what rabbit pellets are made from) was supposedly much too high in protein if they ate it. The grass bedding was supposed to be MUCH better because of that. Both of them broke down and got very dusty. Both of them contributed to dehydration.I come back the next day to find that this thread (at least partially) exploded ?.
So I think it's safe to say that this website is untrustworthy? Here's another exerpt:
There are a number of bedding/substrate available for tortoises. We personally very much like to use dry bedding, such as Aspen (a soft shredded wood based substrate), Kritters Crumble (a less soil based version of coconut husk) and Pellet bedding (compressed grass pellets). These options are organic, tortoise friendly and leave less dust than soil based products.
Alternatively, soil based products are available and are arguably more natural, however, they are high maintenance and take some time to find the correct amount of misting, so it is not too damp and never dusty.
... I think that they believe tortoises should not have much (if any) moisture at all in their enclosure?