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Healthy Trees- Sustainable Landscape ASLA National Conference 2008 - page 46 / 51

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Sustainable Soil Quality A balanced Soil Food Web will:

Suppress disease-causing and pest organisms.

Retain nitrogen and other nutrients

Make nutrients available for plant growth at the times plants require at the rates plants require.

Decompose plant residues rapidly.

Produce hormones that help plants grow.

Produce good soil structure, improving water infiltration, oxygen diffusion, and water-holding capacity.

Consume pollutants in the soil.

Be aware that these functions are entirely biological and only occur through a soil foodweb that is built-up, intact, and working.

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