At last, a formula presenting the relation of liquid plastic limit of organic soil is derived.

最后，给出有机质土的液塑限关系推导公式。

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The organic soil must be stored outside the yard in the selected sites, to be used in the stabilization of area, slope protection, or other required activities.

有机土壤必须存放于选定位置的场地，以用于场区稳定、边坡防护、或其他要求的活动。

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Organic agriculture also creates less soil and water pollution and lower greenhouse gas emissions.

有机农业还减少了土壤污染和水污染，降低了温室气体排放量。

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David Robson from the University of Illinois Extension says the best results come from moist, richly organic black soil.

VOA: special.2009.07.07

To improve clay soils, mix in garden waste or other organic matter and turn the soil deeply in the fall.

VOA: special.2009.03.10

After the potato plants appear, organic mulch can be spread around to hold moisture, help suppress weed growth and cool the soil.

VOA: special.2009.03.10

The key additives in Organic Choice soil: chicken manure and yucca plant extract, a wetting agent.

FORBES: Magazine Article

Scotts execs were surprised that consumers were turned off when told Organic Choice soil contained pasteurized chicken waste, which Scotts gets from a Perdue factory in Seaford, Del.

FORBES: Magazine Article

Lehmann, the lead author of the paper which is published in the journal Nature Geosciences, said that the black carbon content of soils in the study ranged from zero to 82 percent of soil organic carbon.

CNN: Soil study hints at climate model revision