Re: How can the Murry Darling System be saved for ever? Very interesting Look too at the role of charcoal and organic matter together. Charcoal seems to act as a catalist for increasing soil microbiological activity. Some say because it provides a protective environment for bacteria etc. The practice of Aboriginal cool burning ( burning slowly on wet days) etc0 would have provided charcoal as well as ash (ash raising/neutralising PH.) Of course it also sequesters CO2 for a lot longer than organic matter. I also just read a report that said nitrogen fixing bacteria is killed by high nitrogen fertilisers While fascinating how does all this pertain to the Murray Darling System? IMO the problem is lack of water. We need to get a lot more water in the system by re-routing coastal rivers desalination from coastal rives (including helping environmental flows to some of the border rivers in trouble) air-water harvesting on a massive scale (or using lots of small solar powered units along the length of the river a massive pipe line from N. Australia pumping from underground aquifers We need a stable continuous source of water, freed from the vagaries of rainfall and weather. If the ancient Romans could archive this for their towns & cities- sometimes with aquifers hundreds of miles long- surely we can do the same. This is not just for us but the huge amount of wildlife dependant on the system. (40% of Australia's birds for example.) Once the river goes acid, that is the end of the rain/drought-food-chain ecology. We have twelve months, before the biggest environmental disaster in Australian (World?) history. Even rains won't really save us, they will just make us more complacent and reduce the urgency of the problem- which will always be there.