its funny, we often fantasise about having 'rich loamy soil' to race on, like they have in the states (not cal) and nz, but you forget just how much loose soil ruts up and makes for horrendous solid ruts both in the direction you're going in (meaning any hesitation and you cross rut and go over) or across the track ruts (which mean your corner entry and exits put you all over the shop). conversely, i always used to think what a shame it was that fairbairn park had this rotten hard as rock clay 'soil'.
well after the amcross young gig where all that 'rich dark loam' turned the track into a navigational nightmare (vmxman will confirm - he thought it was a good trials track), i now see fairbairn as blessed. you can race on it all day long with hundreds of others and there's very little rutting up in and out of corners, and jumpfaces stay the same (smooth - and the safer for it).
and now mr myers has added them truckloads of sand and sawdust to the straights, do get the loam effect but without the rutting. we're blessed in fact!!