Environmental Engineering Reference
In-Depth Information
FIGURE 18.3
The.“box.ield”.found.at.the.Luojiajiao.site,.Zhejiang.province.
FIGURE 18.4
Pits.and.residual.bones.found.in.the.sublayer.soil.of.the.“box.ield”.(15-30.cm).
of.this.site..This.implies.that.the.current.cultivated.layers.of.rice.paddy.ields.
were.originally.utilized.by.primitive.communities.approximately.6700-7200.
years.ago,.which.were.subsequently.buried.by.loods.due.to.prehistoric.cli-
mate.changes..According.to.the.records.from.the.local.annals,.the.land.was.
then.used.for.cultivating.mulberry.trees.and.raising.silkworms.from.around.
4700. BP.. The. soil. was. dug. and. stacked. up. to. form. small. hills. in. order. to.
induce.mulberry.tree.growth,.resulting.in.higher.yields.of.mulberry.leaves.
and,.thus,.inally.a.greater.harvest.of.cocoons..After.many.years.of.continual.
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