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Published byDwayne Arnold Modified over 8 years ago
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Love Dirt healthy soil, healthy future SFU Composts! John Paul, PhD President
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What is Soil? Soil is 95 to 99% bits of rock – combinations of sand, silt and clay
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Organic Matter Makes up the other 1 to 5% of soil Organic matter is present only in the top 15 to 30 cm of the soil We have lost up to 50% of our organic matter worldwide No organic matter, no life
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Why should you care about soil organic matter? Soil Organic Matter Improves Soil Biological Properties – Greater abundance, diversity and activity of soil microbes – Increased nutrient cycling – Increased root elongation and abundance – Increased access to water and nutrients Soil Organic Matter Improves Soil Biological Properties – Greater abundance, diversity and activity of soil microbes – Increased nutrient cycling – Increased root elongation and abundance – Increased access to water and nutrients
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2008/Compost Facility Operators Course/Operation A finished compost … Has a dark brown color Is crumbly, loose, and humus-like Has an earthy smell Contains no readily recognizable materials
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Compost is not just the backyard type … It has a consistent quality It has no weed seeds It is free of pathogens It is safe But not all compost is the same!
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Compost is not soil….! Assuming similar maturity, composts vary in pH, nutrient content and electrical conductivity (a measure of soluble nutrients in compost)
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Making compost safely Transform conducted an organics collection and composting pilot in 2006 No odor, no rodents, met Class A compost requirements District of Kent, BC
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Making compost safely Transform is working with the District of Mission to compost greenwaste and foodwaste District of Mission, BC Compost for: - Sale as a soil conditioner -Blending with soil to meet new soil standards
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District of Mission Rot Pot Program Organic Waste Recycling District of Mission, BC
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Composting at Mission Landfill
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Reporting temperature
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Cooking lunch in the compost pile
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Enjoying lunch cooked in the compost pile
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Potential pathogen kill results (first batch of compost) Sample #District of Mission ColiformsTotalFecalE. Coli 1< 3 2 3 4 5 6 7 Numbers are in MPN/g (most probable number) All seven samples must be below 1000 MPN/g Compost meets Class A standards for metals
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Compost characteristics Characteristics (dry wt)District of MissionLawn Topdress Compost Moisture Content (%)3547 pH7.28.6 Electrical conductivity (dS/m)3.912.2 % N1.323.08 % P 2 O 5 0.534.44 % K 2 00.992.21 Sodium as % of EC1315 % Organic Matter3266 Which characteristic is most important for defining compost?
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