On 6/4/10 1:58 PM, Billy wrote [in part]:
Is urea an artificial substance, or one found in, and produced by
organisms, Frank?

The urea granules in a sack in my garage are artificial. The urea on my
patio -- urine from my tortoise -- is natural. BOTH are organic.

--
David E. Ross
Climate: California Mediterranean
Sunset Zone: 21 -- interior Santa Monica Mountains with some ocean
influence (USDA 10a, very close to Sunset Zone 19)
Gardening diary at http://www.rossde.com/garden/diary