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Horticulture Principles and Practices

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Compost materials<br />

FIGURE 22-4<br />

a wire basket.<br />

Composting in<br />

Wire mesh (or poultry<br />

wire, etc.)<br />

Door<br />

FIGURE 22-5<br />

tumbler.<br />

A compost<br />

Compost<br />

material<br />

Tumbler<br />

Compost<br />

Bin<br />

Insulation<br />

FIGURE 22-6<br />

Pit composting.<br />

Pit in the ground<br />

Compost pile<br />

(appropriately layered)<br />

compost may be dug up <strong>and</strong> used elsewhere or left in place <strong>and</strong> crops planted in it.<br />

The container in this case is the earth. A variation of this method is trench composting,<br />

in which the material is buried in long trenches (Figure 22–7). Once decomposed, the<br />

trench is used as a bed for growing crops, while the adjacent row separated by a path is<br />

then dug up as a new trench for composting. The compost trench becomes a walkway<br />

before it is used for growing crops, thus giving the material two years to decompose<br />

properly.<br />

22.17 Constructing Outdoor Composting Systems 667

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