Struvite? What's that?

Last week I had the good fortune of joining an enthusiastic group of agronomists and farmers on a small farmyard near Libau, just off Hwy 59 north east of Winnipeg. Anyone knowing anything about farming and Manitoba, knows that Libau is not known as a farming area. So why were we there?
Our common concern was sustainable food production, in this case concerns about P – phosphorous.