Is a soil-ameliorant/soil-conditioner. It is produced at the Icon Water Lower Molonglo Water Qulity Control Centre in the ACT. It is not produced to any specification and the composition may vary. Fertspread are the sole distributers and although the product is readily available, from time to time demand outstrips supply.
Sewage ash is a complex and variable combination of materials resulting from the combustion of organic material and added chemicals. Many of these elements emanate from within the sewage collection system; others are added as part of the sewage treatment process.
Sewage ash is produced at temperatures above 650C and is sterile. It contains no carbon or nitrogenous fertiliser value. The major constituents are calcium carbonate (limestone) and calcium phosphate.
Sewage ash has about half the neutralising value of lime, the neutralising value is around 60%. The phosphate level is around 6.6% and there are many trace elements in the product. 1.12% of the total phosphate is citrate soluble and 5.48% is citrate insoluble in a slow release form. Agri-ash is a light brown, sterile, dusty product that is has similar handling characteristics to superfine lime. The product is best handled by professional contractors because of the difficulties in spreading the product.
Agri-ash is delivered in bulk only, in approx. 31 tonne loads. Upon delivery it should be left uncovered in the paddock throughout all types of weather.
Agri-ash allows you to apply a capital application of phosphorus at a low price while still achieving your liming requirements. Most farmers have been exceptionally pleased with results from Agri-ash and have become repeat users.
Agri Ash spread at Big Hill Maulan 40ha @ 2.5t/ha
"South Raeburn" Bredalbane
Soil phosphorus levels have been boosted in recent years by applications of 5-7.4 tonnes/ha of nutrient-rich sewerage ash, which also corrects soil acidity.
Caption taken from The Land Newspaper on the sale of “South Raeburn” Nov 2011