The researchers say the nanodiamonds were all found in a level of soil thought to be about 13,000 years old.

VOA: special.2009.01.20

Soil should also be tested for its pH level, a measure of the acid and alkaline balance.

VOA: special.2009.06.09

Beets need the acidity level in the soil to be six to seven and a half.

VOA: special.2010.03.02

From packaging, sales, and marketing to shipping and inventory management, sowing entrepreneurial seeds in Costco soil yields a high level of productivity and effectiveness.

FORBES: The Costco Factor: To Win The Business Game, You Need to Change How You Think

But the real work of conservatives now is not at that superficial, topsoil level, it is in the deeper soil of policy and the tap root of values where conservatives need to toil now.

FORBES: Ignore The Pundits, Conservatism Doesn't Need An Extreme Makeover

Working organic amendments such as compost into your soil will help it drain faster and retain a more even level of moisture.

CNN: X-rated yards save the environment