I've just moved into a new place with (yay) volcanic soil. No more sticky boggy clay! The previous tenant kindly left behind some raised beds. I've grown veges successfully in the past but haven't paid any attention to the nutrients (or lack thereof) in the soil. How do I work out what nutrients are lacking? I have noticed an absence of weeds in the empty beds and wonder if that means the soil is "dead". Soil 101 hints and tips required please.