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Benefits of Compost Use David Allen MBS Environmental.

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Presentation on theme: "Benefits of Compost Use David Allen MBS Environmental."— Presentation transcript:

1 Benefits of Compost Use David Allen MBS Environmental

2 Chemistry Physics Biology Water Retention Drainage Aeration Compaction Nutrient Supply Nutrient Retention pH Control Nutrient Recycling Disease Control

3 Improving Physical Properties of Soils: Improving water holding capacity Reducing bulk density of compacted soils Reducing clay dispersion in hard-setting soils Improving drainage Improving water holding capacity Reducing bulk density of compacted soils Reducing clay dispersion in hard-setting soils Improving drainage Improving Biological Properties of Soils: Provides nutrients and energy for soil flora and fauna Increases nutrient recycling Reduces plant pathogens and diseases Provides nutrients and energy for soil flora and fauna Increases nutrient recycling Reduces plant pathogens and diseases

4 Supplies nutrients “Unlocks” stored soil nutrients “Slow-release” properties Balanced nutrient profile Improves effectiveness of added fertilisers o Increases nutrient retention (cations and trace elements) o Reduces leaching losses of mobile nutrients Maintains near-neutral pH values: o Lime effect on acidic soils o Reduces effects of soil alkalinity Supplies nutrients “Unlocks” stored soil nutrients “Slow-release” properties Balanced nutrient profile Improves effectiveness of added fertilisers o Increases nutrient retention (cations and trace elements) o Reduces leaching losses of mobile nutrients Maintains near-neutral pH values: o Lime effect on acidic soils o Reduces effects of soil alkalinity Improving Chemical Fertility of Soils:

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11 Quindalup SandSpearwood SandBassendean sand

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13 Forms of Nutrients in Compost Incorporated into organic matter. (Carbon, nitrogen, phosphorus, sulphur) Adsorbed onto organic matter surface. (Potassium, ammonium-N, calcium, boron, copper, zinc) Inorganic minerals (Calcium, phosphorus, sulphur) Water-soluble Salts (Sulphate-S, nitrate-N, soluble reactive phosphorus, chloride)

14 Comparison of Nutrient Content with Other Organics and Fertilisers NutrientUnitsCompostBiosolidsCow Manure Poultry Manure UreaSuper- phosphate Nitrophoska Nitrogen% Phosphorus% to Potassium% to Calcium% Magnesium% Sulphur% to Boronmg/kg< Coppermg/kg Ironmg/kg Manganesemg/kg Molybdenummg/kg< Zincmg/kg

15 Nitrogen ParameterUnitsABCDEF Carbon% Nitrogen% C : N ratio NO3-Nmg/L NH4-Nmg/L

16 Phosphorus ParameterUnitsABCDEF Total P% Extractable P% Water-soluble Pmg/L

17 Cations ParameterUnitsABCDEF Total Ca% Extr. Ca% Total Mg% Extr. Mg% Total K% Extr. K% Total Na% Extr. Na%

18 Trace Elements ParameterUnitsABCDEF Total Bmg/kg<100 Extr. Bmg/kg Total Cumg/kg< Extr. Cumg/kg Total Mnmg/kg Extr. Mnmg/kg Total Znmg/kg Extr. Znmg/kg

19 Water Holding Capacity ParameterUnitsABCDEF Water Holding Capacity%

20 pH Control ParameterABCDEF pH Cations Anions Before composting Anions After composting Calcium Magnesium Potassium Sodium Organic anions Phosphate Sulphate Nitrate Alkalinity

21 A Year in the Life of a Phosphate Molecule January

22 A Year in the Life of a Phosphate Molecule February - March

23 A Year in the Life of a Phosphate Molecule October - November

24 A Year in the Life of a Phosphate Molecule December Landfill

25 Application Rates Intended UseApplication Rate (cubic metres per hectare) Increasing water holding capacity50 to 200 Improving soil structure20 to 100 Countering acidity/alkalinity20 to 50 Long term nutrient supply20 to 100 Short term nutrient supply5 to 20 Improving soil biology<1 to 50

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