San Francisco : Architect and Engineer, Inc · leaf 539
r example, as itbreaks down, it releases and contributes its quan-tity of the essential elements; (there are 10). Further,it holds moisture and provides tiny paths for waterthrough the soil. Humus feeds the useful bacteria,and creates happy homes for mould, fungi, andearthworms, all agents for… … loosen any soil. What the gardener strives for isa fluffy soil; one that literally foams through thefingers at planting time. Roots newly planted willthen penetrate far and the plant becomes estab-lished in vigor. Sand is no substitute for humus,sand, remember, makes cement, and no rootgrows in…
Architecture · Building
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